Added missing @Override-s (Java 6 language cleanup)
diff --git a/src/main/java/freemarker/cache/ByteArrayTemplateLoader.java b/src/main/java/freemarker/cache/ByteArrayTemplateLoader.java
index e82760b..1440284 100644
--- a/src/main/java/freemarker/cache/ByteArrayTemplateLoader.java
+++ b/src/main/java/freemarker/cache/ByteArrayTemplateLoader.java
@@ -63,17 +63,21 @@
         return templates.remove(name) != null;
     }
     
+    @Override
     public void closeTemplateSource(Object templateSource) {
     }
     
+    @Override
     public Object findTemplateSource(String name) {
         return templates.get(name);
     }
     
+    @Override
     public long getLastModified(Object templateSource) {
         return ((ByteArrayTemplateSource) templateSource).lastModified;
     }
     
+    @Override
     public Reader getReader(Object templateSource, String encoding) throws UnsupportedEncodingException {
         return new InputStreamReader(
                 new ByteArrayInputStream(((ByteArrayTemplateSource) templateSource).templateContent),
diff --git a/src/main/java/freemarker/cache/FileTemplateLoader.java b/src/main/java/freemarker/cache/FileTemplateLoader.java
index 1484b2e..7dfa071 100644
--- a/src/main/java/freemarker/cache/FileTemplateLoader.java
+++ b/src/main/java/freemarker/cache/FileTemplateLoader.java
@@ -117,6 +117,7 @@
     public FileTemplateLoader(final File baseDir, final boolean disableCanonicalPathCheck) throws IOException {
         try {
             Object[] retval = AccessController.doPrivileged(new PrivilegedExceptionAction<Object[]>() {
+                @Override
                 public Object[] run() throws IOException {
                     if (!baseDir.exists()) {
                         throw new FileNotFoundException(baseDir + " does not exist.");
@@ -150,9 +151,11 @@
         }
     }
     
+    @Override
     public Object findTemplateSource(final String name) throws IOException {
         try {
             return AccessController.doPrivileged(new PrivilegedExceptionAction<File>() {
+                @Override
                 public File run() throws IOException {
                     File source = new File(baseDir, SEP_IS_SLASH ? name : 
                         name.replace('/', File.separatorChar));
@@ -183,17 +186,21 @@
         }
     }
     
+    @Override
     public long getLastModified(final Object templateSource) {
         return (AccessController.doPrivileged(new PrivilegedAction<Long>() {
+            @Override
             public Long run() {
                 return Long.valueOf(((File) templateSource).lastModified());
             }
         })).longValue();
     }
     
+    @Override
     public Reader getReader(final Object templateSource, final String encoding) throws IOException {
         try {
             return AccessController.doPrivileged(new PrivilegedExceptionAction<Reader>() {
+                @Override
                 public Reader run() throws IOException {
                     if (!(templateSource instanceof File)) {
                         throw new IllegalArgumentException(
@@ -258,6 +265,7 @@
         return true;
     }
 
+    @Override
     public void closeTemplateSource(Object templateSource) {
         // Do nothing.
     }
diff --git a/src/main/java/freemarker/cache/MruCacheStorage.java b/src/main/java/freemarker/cache/MruCacheStorage.java
index e0ecc09..84d2072 100644
--- a/src/main/java/freemarker/cache/MruCacheStorage.java
+++ b/src/main/java/freemarker/cache/MruCacheStorage.java
@@ -82,6 +82,7 @@
         this.softSizeLimit = softSizeLimit;
     }
     
+    @Override
     public Object get(Object key) {
         removeClearedReferences();
         MruEntry entry = (MruEntry) map.get(key);
@@ -97,6 +98,7 @@
         return value;
     }
 
+    @Override
     public void put(Object key, Object value) {
         removeClearedReferences();
         MruEntry entry = (MruEntry) map.get(key);
@@ -110,6 +112,7 @@
         
     }
 
+    @Override
     public void remove(Object key) {
         removeClearedReferences();
         removeInternal(key);
@@ -122,6 +125,7 @@
         }
     }
 
+    @Override
     public void clear() {
         strongHead.makeHead();
         softHead.linkAfter(strongHead);
@@ -247,6 +251,7 @@
      * @see #getSoftSize()
      * @since 2.3.21
      */
+    @Override
     public int getSize() {
         return getSoftSize() + getStrongSize();
     }
diff --git a/src/main/java/freemarker/cache/MultiTemplateLoader.java b/src/main/java/freemarker/cache/MultiTemplateLoader.java
index e379625..63bb91b 100644
--- a/src/main/java/freemarker/cache/MultiTemplateLoader.java
+++ b/src/main/java/freemarker/cache/MultiTemplateLoader.java
@@ -55,6 +55,7 @@
         this.templateLoaders = templateLoaders.clone();
     }
 
+    @Override
     public Object findTemplateSource(String name)
             throws IOException {
         TemplateLoader lastTemplateLoader = null;
@@ -93,15 +94,18 @@
         return null;
     }
 
+    @Override
     public long getLastModified(Object templateSource) {
         return ((MultiSource) templateSource).getLastModified();
     }
 
+    @Override
     public Reader getReader(Object templateSource, String encoding)
             throws IOException {
         return ((MultiSource) templateSource).getReader(encoding);
     }
 
+    @Override
     public void closeTemplateSource(Object templateSource)
             throws IOException {
         ((MultiSource) templateSource).close();
@@ -110,6 +114,7 @@
     /**
      * Clears the sickiness memory, also resets the state of all enclosed {@link StatefulTemplateLoader}-s.
      */
+    @Override
     public void resetState() {
         lastTemplateLoaderForName.clear();
         for (TemplateLoader loader : templateLoaders) {
diff --git a/src/main/java/freemarker/cache/NullCacheStorage.java b/src/main/java/freemarker/cache/NullCacheStorage.java
index c9a9cb5..04e39b3 100644
--- a/src/main/java/freemarker/cache/NullCacheStorage.java
+++ b/src/main/java/freemarker/cache/NullCacheStorage.java
@@ -34,22 +34,27 @@
      */
     public static final NullCacheStorage INSTANCE = new NullCacheStorage();
 
+    @Override
     public boolean isConcurrent() {
         return true;
     }
     
+    @Override
     public Object get(Object key) {
         return null;
     }
 
+    @Override
     public void put(Object key, Object value) {
         // do nothing
     }
 
+    @Override
     public void remove(Object key) {
         // do nothing
     }
     
+    @Override
     public void clear() {
         // do nothing
     }
@@ -59,6 +64,7 @@
      * 
      * @since 2.3.21
      */
+    @Override
     public int getSize() {
         return 0;
     }
diff --git a/src/main/java/freemarker/cache/SoftCacheStorage.java b/src/main/java/freemarker/cache/SoftCacheStorage.java
index fddceaa..72d49ab 100644
--- a/src/main/java/freemarker/cache/SoftCacheStorage.java
+++ b/src/main/java/freemarker/cache/SoftCacheStorage.java
@@ -55,6 +55,7 @@
     /**
      * Returns true if the underlying Map is a {@code ConcurrentMap}.
      */
+    @Override
     public boolean isConcurrent() {
         return concurrent;
     }
@@ -64,22 +65,26 @@
         this.concurrent = map instanceof ConcurrentMap;
     }
     
+    @Override
     public Object get(Object key) {
         processQueue();
         Reference ref = (Reference) map.get(key);
         return ref == null ? null : ref.get();
     }
 
+    @Override
     public void put(Object key, Object value) {
         processQueue();
         map.put(key, new SoftValueReference(key, value, queue));
     }
 
+    @Override
     public void remove(Object key) {
         processQueue();
         map.remove(key);
     }
 
+    @Override
     public void clear() {
         map.clear();
         processQueue();
@@ -90,6 +95,7 @@
      * 
      * @since 2.3.21
      */
+    @Override
     public int getSize() {
         processQueue();
         return map.size();
diff --git a/src/main/java/freemarker/cache/StringTemplateLoader.java b/src/main/java/freemarker/cache/StringTemplateLoader.java
index 554555b..dd1610a 100644
--- a/src/main/java/freemarker/cache/StringTemplateLoader.java
+++ b/src/main/java/freemarker/cache/StringTemplateLoader.java
@@ -117,17 +117,21 @@
         return templates.remove(name) != null;
     }
     
+    @Override
     public void closeTemplateSource(Object templateSource) {
     }
     
+    @Override
     public Object findTemplateSource(String name) {
         return templates.get(name);
     }
     
+    @Override
     public long getLastModified(Object templateSource) {
         return ((StringTemplateSource) templateSource).lastModified;
     }
     
+    @Override
     public Reader getReader(Object templateSource, String encoding) {
         return new StringReader(((StringTemplateSource) templateSource).templateContent);
     }
diff --git a/src/main/java/freemarker/cache/StrongCacheStorage.java b/src/main/java/freemarker/cache/StrongCacheStorage.java
index c423142..4ed8332 100644
--- a/src/main/java/freemarker/cache/StrongCacheStorage.java
+++ b/src/main/java/freemarker/cache/StrongCacheStorage.java
@@ -36,18 +36,22 @@
     /**
      * Always returns {@code true}.
      */
+    @Override
     public boolean isConcurrent() {
         return true;
     }
     
+    @Override
     public Object get(Object key) {
         return map.get(key);
     }
 
+    @Override
     public void put(Object key, Object value) {
         map.put(key, value);
     }
 
+    @Override
     public void remove(Object key) {
         map.remove(key);
     }
@@ -57,10 +61,12 @@
      * 
      * @since 2.3.21
      */
+    @Override
     public int getSize() {
         return map.size();
     }
     
+    @Override
     public void clear() {
         map.clear();
     }
diff --git a/src/main/java/freemarker/cache/URLTemplateLoader.java b/src/main/java/freemarker/cache/URLTemplateLoader.java
index ae8cda5..aae0275 100644
--- a/src/main/java/freemarker/cache/URLTemplateLoader.java
+++ b/src/main/java/freemarker/cache/URLTemplateLoader.java
@@ -38,16 +38,19 @@
     
     private Boolean urlConnectionUsesCaches;
     
+    @Override
     public Object findTemplateSource(String name)
     throws IOException {
         URL url = getURL(name);
         return url == null ? null : new URLTemplateSource(url, getURLConnectionUsesCaches());
     }
     
+    @Override
     public long getLastModified(Object templateSource) {
         return ((URLTemplateSource) templateSource).lastModified();
     }
     
+    @Override
     public Reader getReader(Object templateSource, String encoding)
     throws IOException {
         return new InputStreamReader(
@@ -55,6 +58,7 @@
                 encoding);
     }
     
+    @Override
     public void closeTemplateSource(Object templateSource)
     throws IOException {
         ((URLTemplateSource) templateSource).close();
diff --git a/src/main/java/freemarker/cache/WebappTemplateLoader.java b/src/main/java/freemarker/cache/WebappTemplateLoader.java
index f3376d3..8ff7b6c 100644
--- a/src/main/java/freemarker/cache/WebappTemplateLoader.java
+++ b/src/main/java/freemarker/cache/WebappTemplateLoader.java
@@ -91,6 +91,7 @@
         this.servletContext = servletContext;
     }
 
+    @Override
     public Object findTemplateSource(String name) throws IOException {
         String fullPath = subdirPath + name;
 
@@ -121,6 +122,7 @@
         return url == null ? null : new URLTemplateSource(url, getURLConnectionUsesCaches());
     }
 
+    @Override
     public long getLastModified(Object templateSource) {
         if (templateSource instanceof File) {
             return ((File) templateSource).lastModified();
@@ -129,6 +131,7 @@
         }
     }
 
+    @Override
     public Reader getReader(Object templateSource, String encoding)
             throws IOException {
         if (templateSource instanceof File) {
@@ -142,6 +145,7 @@
         }
     }
 
+    @Override
     public void closeTemplateSource(Object templateSource) throws IOException {
         if (templateSource instanceof File) {
             // Do nothing.
diff --git a/src/main/java/freemarker/core/AddConcatExpression.java b/src/main/java/freemarker/core/AddConcatExpression.java
index 86eb02d..a4bfb9f 100644
--- a/src/main/java/freemarker/core/AddConcatExpression.java
+++ b/src/main/java/freemarker/core/AddConcatExpression.java
@@ -202,11 +202,13 @@
             this.right = right;
         }
 
+        @Override
         public int size()
         throws TemplateModelException {
             return left.size() + right.size();
         }
 
+        @Override
         public TemplateModel get(int i)
         throws TemplateModelException {
             int ls = left.size();
@@ -224,12 +226,14 @@
             this.right = right;
         }
         
+        @Override
         public TemplateModel get(String key)
         throws TemplateModelException {
             TemplateModel model = right.get(key);
             return (model != null) ? model : left.get(key);
         }
 
+        @Override
         public boolean isEmpty()
         throws TemplateModelException {
             return left.isEmpty() && right.isEmpty();
@@ -246,17 +250,20 @@
             super(left, right);
         }
         
+        @Override
         public int size() throws TemplateModelException {
             initKeys();
             return keys.size();
         }
 
+        @Override
         public TemplateCollectionModel keys()
         throws TemplateModelException {
             initKeys();
             return keys;
         }
 
+        @Override
         public TemplateCollectionModel values()
         throws TemplateModelException {
             initValues();
diff --git a/src/main/java/freemarker/core/BodyInstruction.java b/src/main/java/freemarker/core/BodyInstruction.java
index 102ce67..8a88c06 100644
--- a/src/main/java/freemarker/core/BodyInstruction.java
+++ b/src/main/java/freemarker/core/BodyInstruction.java
@@ -146,10 +146,12 @@
             }
         }
         
+        @Override
         public TemplateModel getLocalVariable(String name) throws TemplateModelException {
             return bodyVars == null ? null : bodyVars.get(name);
         }
         
+        @Override
         public Collection getLocalVariableNames() {
             List bodyParameterNames = invokingMacroContext.nestedContentParameterNames;
             return bodyParameterNames == null ? Collections.EMPTY_LIST : bodyParameterNames;
diff --git a/src/main/java/freemarker/core/BoundedRangeModel.java b/src/main/java/freemarker/core/BoundedRangeModel.java
index 84e2f28..5d23319 100644
--- a/src/main/java/freemarker/core/BoundedRangeModel.java
+++ b/src/main/java/freemarker/core/BoundedRangeModel.java
@@ -42,6 +42,7 @@
         this.affectedByStringSlicingBug = inclusiveEnd;
     }
 
+    @Override
     public int size() {
         return size;
     }
diff --git a/src/main/java/freemarker/core/BuiltInsForCallables.java b/src/main/java/freemarker/core/BuiltInsForCallables.java
index 7cea824..e27d2cc 100644
--- a/src/main/java/freemarker/core/BuiltInsForCallables.java
+++ b/src/main/java/freemarker/core/BuiltInsForCallables.java
@@ -44,6 +44,7 @@
 
         protected abstract boolean isOrderLast();
 
+        @Override
         TemplateModel _eval(Environment env) throws TemplateException {
             TemplateModel model = target.eval(env);
             if (model instanceof Macro) {
@@ -69,6 +70,7 @@
                 this.macroOrFunction = macroOrFunction;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args.size(), 1);
                 TemplateModel argTM = (TemplateModel) args.get(0);
@@ -99,6 +101,7 @@
                 this.method = method;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args.size(), 1);
                 TemplateModel argTM = (TemplateModel) args.get(0);
@@ -107,6 +110,7 @@
                     final TemplateSequenceModel withArgs = (TemplateSequenceModel) argTM;
                     if (method instanceof TemplateMethodModelEx) {
                         return new TemplateMethodModelEx() {
+                            @Override
                             public Object exec(List origArgs) throws TemplateModelException {
                                 int withArgsSize = withArgs.size();
                                 List<TemplateModel> newArgs = new ArrayList<>(
@@ -127,6 +131,7 @@
                         };
                     } else {
                         return new TemplateMethodModel() {
+                            @Override
                             public Object exec(List origArgs) throws TemplateModelException {
                                 int withArgsSize = withArgs.size();
                                 List<String> newArgs = new ArrayList<>(
@@ -187,6 +192,7 @@
                 this.directive = directive;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args.size(), 1);
                 TemplateModel argTM = (TemplateModel) args.get(0);
@@ -194,6 +200,7 @@
                 if (argTM instanceof TemplateHashModelEx) {
                     final TemplateHashModelEx withArgs = (TemplateHashModelEx) argTM;
                     return new TemplateDirectiveModel() {
+                        @Override
                         public void execute(Environment env, Map origArgs, TemplateModel[] loopVars,
                                 TemplateDirectiveBody body) throws TemplateException, IOException {
                             int withArgsSize = withArgs.size();
diff --git a/src/main/java/freemarker/core/BuiltInsForDates.java b/src/main/java/freemarker/core/BuiltInsForDates.java
index 5fc0a22..c4f660b 100644
--- a/src/main/java/freemarker/core/BuiltInsForDates.java
+++ b/src/main/java/freemarker/core/BuiltInsForDates.java
@@ -88,6 +88,7 @@
                 this.env = env;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1);
                 
diff --git a/src/main/java/freemarker/core/BuiltInsForExistenceHandling.java b/src/main/java/freemarker/core/BuiltInsForExistenceHandling.java
index 9e83d37..ea8b466 100644
--- a/src/main/java/freemarker/core/BuiltInsForExistenceHandling.java
+++ b/src/main/java/freemarker/core/BuiltInsForExistenceHandling.java
@@ -71,6 +71,7 @@
                 this.constant = constant;
             }
 
+            @Override
             public Object exec(List args) {
                 return constant;
             }
@@ -82,6 +83,7 @@
          */
         private static final TemplateMethodModelEx FIRST_NON_NULL_METHOD =
             new TemplateMethodModelEx() {
+                @Override
                 public Object exec(List args) throws TemplateModelException {
                     int argCnt = args.size();
                     if (argCnt == 0) throw _MessageUtil.newArgCntError("?default", argCnt, 1, Integer.MAX_VALUE);
diff --git a/src/main/java/freemarker/core/BuiltInsForLoopVariables.java b/src/main/java/freemarker/core/BuiltInsForLoopVariables.java
index 416774a..311a71a 100644
--- a/src/main/java/freemarker/core/BuiltInsForLoopVariables.java
+++ b/src/main/java/freemarker/core/BuiltInsForLoopVariables.java
@@ -140,6 +140,7 @@
                 this.iterCtx = iterCtx;
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1, Integer.MAX_VALUE);
                 return args.get(iterCtx.getIndex() % args.size());
diff --git a/src/main/java/freemarker/core/BuiltInsForMultipleTypes.java b/src/main/java/freemarker/core/BuiltInsForMultipleTypes.java
index cf70c31..a8b1130 100644
--- a/src/main/java/freemarker/core/BuiltInsForMultipleTypes.java
+++ b/src/main/java/freemarker/core/BuiltInsForMultipleTypes.java
@@ -125,10 +125,12 @@
             return new SimpleScalar(env.getCNumberFormat().format(num));
         }
 
+        @Override
         public int getMinimumICIVersion() {
             return _TemplateAPI.VERSION_INT_2_3_21;
         }
         
+        @Override
         public Object getPreviousICIChainMember() {
             return prevICIObj;
         }
@@ -153,11 +155,13 @@
                 this.defaultFormat = env.getTemplateDateFormat(dateType, Date.class, target, false);
             }
             
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 0, 1);
                 return args.size() == 0 ? getAsDateModel() : get((String) args.get(0));
             }
             
+            @Override
             public TemplateModel get(String pattern) throws TemplateModelException {
                 TemplateDateFormat format;
                 try {
@@ -188,14 +192,17 @@
                 return cachedValue;
             }
             
+            @Override
             public Date getAsDate() throws TemplateModelException {
                 return getAsDateModel().getAsDate();
             }
     
+            @Override
             public int getDateType() {
                 return dateType;
             }
     
+            @Override
             public boolean isEmpty() {
                 return false;
             }
@@ -577,11 +584,13 @@
                 this.env = env;
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 2);
                 return new SimpleScalar((String) args.get(bool.getAsBoolean() ? 0 : 1));
             }
     
+            @Override
             public String getAsString() throws TemplateModelException {
                 // Boolean should have come first... but that change would be non-BC. 
                 if (bool instanceof TemplateScalarModel) {
@@ -618,11 +627,13 @@
                                 dateType, EvalUtil.modelToDate(dateModel, target).getClass(), target, true);
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1);
                 return formatWith((String) args.get(0));
             }
 
+            @Override
             public TemplateModel get(String key)
             throws TemplateModelException {
                 return formatWith(key);
@@ -638,6 +649,7 @@
                 }
             }
             
+            @Override
             public String getAsString()
             throws TemplateModelException {
                 if (cachedValue == null) {
@@ -662,6 +674,7 @@
                 return cachedValue;
             }
     
+            @Override
             public boolean isEmpty() {
                 return false;
             }
@@ -692,11 +705,13 @@
                 }
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1);
                 return get((String) args.get(0));
             }
     
+            @Override
             public TemplateModel get(String key) throws TemplateModelException {
                 TemplateNumberFormat format;
                 try {
@@ -721,6 +736,7 @@
                 return new SimpleScalar(result);
             }
             
+            @Override
             public String getAsString() throws TemplateModelException {
                 if (cachedValue == null) {
                     try {
@@ -738,6 +754,7 @@
                 return cachedValue;
             }
     
+            @Override
             public boolean isEmpty() {
                 return false;
             }
diff --git a/src/main/java/freemarker/core/BuiltInsForNodes.java b/src/main/java/freemarker/core/BuiltInsForNodes.java
index acd9fdf..71e76bd 100644
--- a/src/main/java/freemarker/core/BuiltInsForNodes.java
+++ b/src/main/java/freemarker/core/BuiltInsForNodes.java
@@ -127,6 +127,7 @@
             this.env = env;
         }
         
+        @Override
         public Object exec(List names) throws TemplateModelException {
             if (names == null || names.isEmpty()) {
                 return this;
diff --git a/src/main/java/freemarker/core/BuiltInsForSequences.java b/src/main/java/freemarker/core/BuiltInsForSequences.java
index 35cd229..b80f42e 100644
--- a/src/main/java/freemarker/core/BuiltInsForSequences.java
+++ b/src/main/java/freemarker/core/BuiltInsForSequences.java
@@ -64,6 +64,7 @@
                 this.tsm = tsm;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1, 2);
                 int chunkSize = getNumberMethodArg(args, 0).intValue();
@@ -97,6 +98,7 @@
                 numberOfChunks = (wrappedTsm.size() + chunkSize - 1) / chunkSize; 
             }
 
+            @Override
             public TemplateModel get(final int chunkIndex)
                     throws TemplateModelException {
                 if (chunkIndex >= numberOfChunks) {
@@ -107,6 +109,7 @@
                     
                     private final int baseIndex = chunkIndex * chunkSize;
 
+                    @Override
                     public TemplateModel get(int relIndex)
                             throws TemplateModelException {
                         int absIndex = baseIndex + relIndex;
@@ -119,6 +122,7 @@
                         }
                     }
 
+                    @Override
                     public int size() throws TemplateModelException {
                         return fillerItem != null || chunkIndex + 1 < numberOfChunks
                                 ? chunkSize
@@ -128,6 +132,7 @@
                 };
             }
 
+            @Override
             public int size() throws TemplateModelException {
                 return numberOfChunks;
             }
@@ -200,6 +205,7 @@
                 this.coll = coll;
             }
 
+            @Override
             public Object exec(List args)
                     throws TemplateModelException {
                 checkMethodArgCount(args, 1, 3);
@@ -278,10 +284,12 @@
                 this.seq = seq;
             }
 
+            @Override
             public TemplateModel get(int index) throws TemplateModelException {
                 return seq.get(seq.size() - 1 - index);
             }
 
+            @Override
             public int size() throws TemplateModelException {
                 return seq.size();
             }
@@ -313,6 +321,7 @@
                 m_env = env;
             }
 
+            @Override
             public Object exec(List args)
                     throws TemplateModelException {
                 checkMethodArgCount(args, 1);
@@ -338,6 +347,7 @@
                 m_env = env;
             }
 
+            @Override
             public Object exec(List args)
                     throws TemplateModelException {
                 checkMethodArgCount(args, 1);
@@ -406,6 +416,7 @@
                 m_env = env;
             }
 
+            @Override
             public final Object exec(List args)
                     throws TemplateModelException {
                 int argCnt = args.size();
@@ -542,6 +553,7 @@
                 this.seq = seq;
             }
             
+            @Override
             public Object exec(List args)
                     throws TemplateModelException {
                 // Should be:
@@ -590,6 +602,7 @@
         
         private static class BooleanKVPComparator implements Comparator, Serializable {
 
+            @Override
             public int compare(Object arg0, Object arg1) {
                 // JDK 1.2 doesn't have Boolean.compareTo
                 boolean b0 = ((Boolean) ((KVP) arg0).key).booleanValue();
@@ -603,6 +616,7 @@
         }
         private static class DateKVPComparator implements Comparator, Serializable {
 
+            @Override
             public int compare(Object arg0, Object arg1) {
                 return ((Date) ((KVP) arg0).key).compareTo(
                         (Date) ((KVP) arg1).key);
@@ -627,6 +641,7 @@
                 this.collator = collator;
             }
 
+            @Override
             public int compare(Object arg0, Object arg1) {
                 return collator.compare(
                         ((KVP) arg0).key, ((KVP) arg1).key);
@@ -639,6 +654,7 @@
                 this.ae = ae;
             }
 
+            @Override
             public int compare(Object arg0, Object arg1) {
                 try {
                     return ae.compareNumbers(
@@ -1034,6 +1050,7 @@
 
     static class filterBI extends FilterLikeBI {
 
+        @Override
         protected TemplateModel calculateResult(
                 final TemplateModelIterator lhoIterator, final TemplateModel lho,
                 boolean lhoIsSequence, final ElementTransformer elementTransformer,
@@ -1058,6 +1075,7 @@
                             TemplateModel prefetchedElement;
                             boolean prefetchedEndOfIterator;
 
+                            @Override
                             public TemplateModel next() throws TemplateModelException {
                                 ensurePrefetchDone();
                                 if (prefetchedEndOfIterator) {
@@ -1067,6 +1085,7 @@
                                 return prefetchedElement;
                             }
 
+                            @Override
                             public boolean hasNext() throws TemplateModelException {
                                 ensurePrefetchDone();
                                 return !prefetchedEndOfIterator;
@@ -1109,6 +1128,7 @@
 
     static class take_whileBI extends FilterLikeBI {
 
+        @Override
         protected TemplateModel calculateResult(
                 final TemplateModelIterator lhoIterator, final TemplateModel lho,
                 boolean lhoIsSequence, final ElementTransformer elementTransformer,
@@ -1135,6 +1155,7 @@
                             TemplateModel prefetchedElement;
                             boolean prefetchedEndOfIterator;
 
+                            @Override
                             public TemplateModel next() throws TemplateModelException {
                                 ensurePrefetchDone();
                                 if (prefetchedEndOfIterator) {
@@ -1144,6 +1165,7 @@
                                 return prefetchedElement;
                             }
 
+                            @Override
                             public boolean hasNext() throws TemplateModelException {
                                 ensurePrefetchDone();
                                 return !prefetchedEndOfIterator;
@@ -1184,6 +1206,7 @@
 
     static class mapBI extends IntermediateStreamOperationLikeBuiltIn {
 
+        @Override
         protected TemplateModel calculateResult(
                 final TemplateModelIterator lhoIterator, TemplateModel lho, boolean lhoIsSequence, final ElementTransformer elementTransformer,
                 final Environment env) throws TemplateException {
@@ -1199,6 +1222,7 @@
                 return new TemplateModelListSequence(resultList);
             } else {
                 TemplateModelIterator mappedLhoIterator = new TemplateModelIterator() {
+                    @Override
                     public TemplateModel next() throws TemplateModelException {
                         try {
                             return fetchAndMapNextElement(lhoIterator, elementTransformer, env);
@@ -1207,6 +1231,7 @@
                         }
                     }
 
+                    @Override
                     public boolean hasNext() throws TemplateModelException {
                         return lhoIterator.hasNext();
                     }
@@ -1239,6 +1264,7 @@
 
     static class drop_whileBI extends FilterLikeBI {
 
+        @Override
         protected TemplateModel calculateResult(
                 final TemplateModelIterator lhoIterator, final TemplateModel lho,
                 boolean lhoIsSequence, final ElementTransformer elementTransformer,
@@ -1268,6 +1294,7 @@
                             TemplateModel prefetchedElement;
                             boolean prefetchedEndOfIterator;
 
+                            @Override
                             public TemplateModel next() throws TemplateModelException {
                                 ensurePrefetchDone();
                                 if (prefetchedEndOfIterator) {
@@ -1277,6 +1304,7 @@
                                 return prefetchedElement;
                             }
 
+                            @Override
                             public boolean hasNext() throws TemplateModelException {
                                 ensurePrefetchDone();
                                 return !prefetchedEndOfIterator;
diff --git a/src/main/java/freemarker/core/BuiltInsForStringsBasic.java b/src/main/java/freemarker/core/BuiltInsForStringsBasic.java
index 4afffb8..4ab8c40 100644
--- a/src/main/java/freemarker/core/BuiltInsForStringsBasic.java
+++ b/src/main/java/freemarker/core/BuiltInsForStringsBasic.java
@@ -81,6 +81,7 @@
                 this.s = s;
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1);
                 return s.indexOf(getStringMethodArg(args, 0)) != -1
@@ -104,6 +105,7 @@
                 this.s = s;
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1);
                 return s.endsWith(getStringMethodArg(args, 0)) ?
@@ -126,6 +128,7 @@
                 this.s = s;
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1);
                 String suffix = getStringMethodArg(args, 0);
@@ -148,6 +151,7 @@
                 this.s = s;
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1, 3);
                 
@@ -197,6 +201,7 @@
                 this.s = s;
             }
             
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 int argCnt = args.size();
                 checkMethodArgCount(argCnt, 1, 2);
@@ -231,6 +236,7 @@
                 this.s = s;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 int argCnt = args.size();
                 checkMethodArgCount(argCnt, 1, 2);
@@ -276,6 +282,7 @@
                 this.s = s;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 int argCnt = args.size();
                 checkMethodArgCount(argCnt, 1, 2);
@@ -328,6 +335,7 @@
                 this.s = s;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 int argCnt = args.size();
                 checkMethodArgCount(argCnt, 1, 2);
@@ -371,6 +379,7 @@
                 this.s = s;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 int argCnt = args.size();
                 checkMethodArgCount(argCnt, 1, 2);
@@ -438,6 +447,7 @@
                 this.s = s;
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 int argCnt  = args.size();
                 checkMethodArgCount(argCnt, 1, 2);
@@ -487,6 +497,7 @@
                 this.s = s;
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1);
                 String prefix = getStringMethodArg(args, 0);
@@ -509,6 +520,7 @@
                 this.s = s;
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1);
                 String suffix = getStringMethodArg(args, 0);
@@ -530,6 +542,7 @@
                 this.s = s;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 int argCnt = args.size();
                 checkMethodArgCount(argCnt, 1, 2);
@@ -564,6 +577,7 @@
                 this.s = s;
             }
     
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1);
                 return s.startsWith(getStringMethodArg(args, 0)) ?
@@ -583,6 +597,7 @@
         TemplateModel calculateResult(final String s, final Environment env) throws TemplateException {
             return new TemplateMethodModelEx() {
                 
+                @Override
                 public Object exec(java.util.List args) throws TemplateModelException {
                     int argCount = args.size();
                     checkMethodArgCount(argCount, 1, 2);
@@ -647,6 +662,7 @@
         @Override
         TemplateModel calculateResult(final String s, final Environment env) {
             return new TemplateMethodModelEx() {
+                @Override
                 public Object exec(java.util.List args) throws TemplateModelException {
                     int argCount = args.size();
                     checkMethodArgCount(argCount, 1, 3);
@@ -701,6 +717,7 @@
     }
 
     static class truncateBI extends AbstractTruncateBI {
+        @Override
         protected TemplateModel truncate(
                 TruncateBuiltinAlgorithm algorithm, String s, int maxLength,
                 TemplateModel terminator, Integer terminatorLength, Environment env)
@@ -708,12 +725,14 @@
             return algorithm.truncate(s, maxLength, (TemplateScalarModel) terminator, terminatorLength, env);
         }
 
+        @Override
         protected boolean allowMarkupTerminator() {
             return false;
         }
     }
 
     static class truncate_wBI extends AbstractTruncateBI {
+        @Override
         protected TemplateModel truncate(
                 TruncateBuiltinAlgorithm algorithm, String s, int maxLength,
                 TemplateModel terminator, Integer terminatorLength, Environment env)
@@ -721,12 +740,14 @@
             return algorithm.truncateW(s, maxLength, (TemplateScalarModel) terminator, terminatorLength, env);
         }
 
+        @Override
         protected boolean allowMarkupTerminator() {
             return false;
         }
     }
 
     static class truncate_cBI extends AbstractTruncateBI {
+        @Override
         protected TemplateModel truncate(
                 TruncateBuiltinAlgorithm algorithm, String s, int maxLength,
                 TemplateModel terminator, Integer terminatorLength, Environment env)
@@ -734,12 +755,14 @@
             return algorithm.truncateC(s, maxLength, (TemplateScalarModel) terminator, terminatorLength, env);
         }
 
+        @Override
         protected boolean allowMarkupTerminator() {
             return false;
         }
     }
 
     static class truncate_mBI extends AbstractTruncateBI {
+        @Override
         protected TemplateModel truncate(
                 TruncateBuiltinAlgorithm algorithm, String s, int maxLength,
                 TemplateModel terminator, Integer terminatorLength, Environment env)
@@ -747,12 +770,14 @@
             return algorithm.truncateM(s, maxLength, terminator, terminatorLength, env);
         }
 
+        @Override
         protected boolean allowMarkupTerminator() {
             return true;
         }
     }
 
     static class truncate_w_mBI extends AbstractTruncateBI {
+        @Override
         protected TemplateModel truncate(
                 TruncateBuiltinAlgorithm algorithm, String s, int maxLength,
                 TemplateModel terminator, Integer terminatorLength, Environment env)
@@ -760,12 +785,14 @@
             return algorithm.truncateWM(s, maxLength, terminator, terminatorLength, env);
         }
 
+        @Override
         protected boolean allowMarkupTerminator() {
             return true;
         }
     }
 
     static class truncate_c_mBI extends AbstractTruncateBI {
+        @Override
         protected TemplateModel truncate(
                 TruncateBuiltinAlgorithm algorithm, String s, int maxLength,
                 TemplateModel terminator, Integer terminatorLength, Environment env)
@@ -773,6 +800,7 @@
             return algorithm.truncateCM(s, maxLength, terminator, terminatorLength, env);
         }
 
+        @Override
         protected boolean allowMarkupTerminator() {
             return true;
         }
diff --git a/src/main/java/freemarker/core/BuiltInsForStringsEncoding.java b/src/main/java/freemarker/core/BuiltInsForStringsEncoding.java
index 3cfb241..f600135 100644
--- a/src/main/java/freemarker/core/BuiltInsForStringsEncoding.java
+++ b/src/main/java/freemarker/core/BuiltInsForStringsEncoding.java
@@ -49,10 +49,12 @@
             return new SimpleScalar(StringUtil.XHTMLEnc(s));
         }
     
+        @Override
         public int getMinimumICIVersion() {
             return _TemplateAPI.VERSION_INT_2_3_20;
         }
     
+        @Override
         public Object getPreviousICIChainMember() {
             return prevICIObj;
         }
@@ -164,6 +166,7 @@
         
         protected abstract String encodeWithCharset(String cs) throws UnsupportedEncodingException;
     
+        @Override
         public Object exec(List args) throws TemplateModelException {
             parent.checkMethodArgCount(args.size(), 1);
             try {
@@ -173,6 +176,7 @@
             }
         }
         
+        @Override
         public String getAsString() throws TemplateModelException {
             if (cachedResult == null) {
                 String cs = env.getEffectiveURLEscapingCharset();
diff --git a/src/main/java/freemarker/core/BuiltInsForStringsMisc.java b/src/main/java/freemarker/core/BuiltInsForStringsMisc.java
index e1bf88b..012a007 100644
--- a/src/main/java/freemarker/core/BuiltInsForStringsMisc.java
+++ b/src/main/java/freemarker/core/BuiltInsForStringsMisc.java
@@ -139,11 +139,13 @@
                 this.env = env;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 checkMethodArgCount(args, 1);
                 return resolvePath(getStringMethodArg(args, 0));
             }
 
+            @Override
             public String getAsString() throws TemplateModelException {
                 return resolvePath(getTemplate().getName());
             }
diff --git a/src/main/java/freemarker/core/BuiltInsForStringsRegexp.java b/src/main/java/freemarker/core/BuiltInsForStringsRegexp.java
index d6d3082..eddc97c 100644
--- a/src/main/java/freemarker/core/BuiltInsForStringsRegexp.java
+++ b/src/main/java/freemarker/core/BuiltInsForStringsRegexp.java
@@ -71,6 +71,7 @@
                 this.matchString = matchString;
             }
             
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 int argCnt = args.size();
                 checkMethodArgCount(argCnt, 1, 2);
@@ -101,6 +102,7 @@
                 this.s = s;
             }
 
+            @Override
             public Object exec(List args) throws TemplateModelException {
                 int argCnt = args.size();
                 checkMethodArgCount(argCnt, 2, 3);
@@ -149,6 +151,7 @@
                 }
             }
             
+            @Override
             public String getAsString() {
                 return matchedInputPart;
             }
@@ -168,6 +171,7 @@
             this.input = input;
         }
         
+        @Override
         public TemplateModel get(int i) throws TemplateModelException {
             ArrayList matchingInputParts = this.matchingInputParts;
             if (matchingInputParts == null) {
@@ -176,6 +180,7 @@
             return (TemplateModel) matchingInputParts.get(i);
         }
         
+        @Override
         public boolean getAsBoolean() {
             Boolean result = entireInputMatched;
             return result != null ? result.booleanValue() : isEntrieInputMatchesAndStoreResults();
@@ -193,6 +198,7 @@
                
                 entireInputMatchGroups = new TemplateSequenceModel() {
                     
+                    @Override
                     public TemplateModel get(int i) throws TemplateModelException {
                         try {
                             return new SimpleScalar(firedEntireInputMatcher.group(i));
@@ -201,6 +207,7 @@
                         }
                     }
                     
+                    @Override
                     public int size() throws TemplateModelException {
                         try {
                             return firedEntireInputMatcher.groupCount() + 1;
@@ -235,6 +242,7 @@
             return matches;
         }
         
+        @Override
         public TemplateModelIterator iterator() {
             final ArrayList matchingInputParts = this.matchingInputParts;
             if (matchingInputParts == null) {
@@ -244,6 +252,7 @@
                     private int nextIdx = 0;
                     boolean hasFindInfo = matcher.find();
                     
+                    @Override
                     public boolean hasNext() {
                         final ArrayList matchingInputParts = RegexMatchModel.this.matchingInputParts;
                         if (matchingInputParts == null) {
@@ -253,6 +262,7 @@
                         }
                     }
                     
+                    @Override
                     public TemplateModel next() throws TemplateModelException {
                         final ArrayList matchingInputParts = RegexMatchModel.this.matchingInputParts;
                         if (matchingInputParts == null) {
@@ -278,10 +288,12 @@
                     
                     private int nextIdx = 0;
                     
+                    @Override
                     public boolean hasNext() {
                         return nextIdx < matchingInputParts.size();
                     }
                     
+                    @Override
                     public TemplateModel next() throws TemplateModelException {
                         try {
                             return (TemplateModel) matchingInputParts.get(nextIdx++);
@@ -293,6 +305,7 @@
             }
         }
         
+        @Override
         public int size() throws TemplateModelException {
             ArrayList matchingInputParts = this.matchingInputParts;
             if (matchingInputParts == null) {
diff --git a/src/main/java/freemarker/core/BuiltinVariable.java b/src/main/java/freemarker/core/BuiltinVariable.java
index 7436dcb..5002a03 100644
--- a/src/main/java/freemarker/core/BuiltinVariable.java
+++ b/src/main/java/freemarker/core/BuiltinVariable.java
@@ -319,10 +319,12 @@
             this.env = env;
         }
         
+        @Override
         public TemplateModel get(String key) throws TemplateModelException {
             return env.getVariable(key);
         }
         
+        @Override
         public boolean isEmpty() {
             return false;
         }
diff --git a/src/main/java/freemarker/core/CollectionAndSequence.java b/src/main/java/freemarker/core/CollectionAndSequence.java
index 0e3f5ed..adca684 100644
--- a/src/main/java/freemarker/core/CollectionAndSequence.java
+++ b/src/main/java/freemarker/core/CollectionAndSequence.java
@@ -47,6 +47,7 @@
         this.sequence = sequence;
     }
 
+    @Override
     public TemplateModelIterator iterator() throws TemplateModelException {
         if (collection != null) {
             return collection.iterator();
@@ -55,6 +56,7 @@
         }
     }
 
+    @Override
     public TemplateModel get(int i) throws TemplateModelException {
         if (sequence != null) {
             return sequence.get(i);
@@ -64,6 +66,7 @@
         }
     }
 
+    @Override
     public int size() throws TemplateModelException {
         if (sequence != null) {
             return sequence.size();
diff --git a/src/main/java/freemarker/core/CommonTemplateMarkupOutputModel.java b/src/main/java/freemarker/core/CommonTemplateMarkupOutputModel.java
index 754ddf5..0a04fce 100644
--- a/src/main/java/freemarker/core/CommonTemplateMarkupOutputModel.java
+++ b/src/main/java/freemarker/core/CommonTemplateMarkupOutputModel.java
@@ -43,6 +43,7 @@
         this.markupContent = markupContent;
     }
 
+    @Override
     public abstract CommonMarkupOutputFormat<MO> getOutputFormat();
 
     /** Maybe {@code null}, but then {@link #getMarkupContent()} isn't {@code null}. */
diff --git a/src/main/java/freemarker/core/DefaultToExpression.java b/src/main/java/freemarker/core/DefaultToExpression.java
index 245525d..b109b79 100755
--- a/src/main/java/freemarker/core/DefaultToExpression.java
+++ b/src/main/java/freemarker/core/DefaultToExpression.java
@@ -37,27 +37,35 @@
     
 	static private class EmptyStringAndSequenceAndHash implements TemplateScalarModel, TemplateSequenceModel,
 	        TemplateHashModelEx2 {
-		public String getAsString() {
+		@Override
+        public String getAsString() {
 			return "";
 		}
-		public TemplateModel get(int i) {
+		@Override
+        public TemplateModel get(int i) {
 			return null;
 		}
-		public TemplateModel get(String s) {
+		@Override
+        public TemplateModel get(String s) {
 			return null;
 		}
-		public int size() {
+		@Override
+        public int size() {
 			return 0;
 		}
-		public boolean isEmpty() {
+		@Override
+        public boolean isEmpty() {
 			return true;
 		}
-		public TemplateCollectionModel keys() {
+		@Override
+        public TemplateCollectionModel keys() {
 			return EMPTY_COLLECTION;
 		}
-		public TemplateCollectionModel values() {
+		@Override
+        public TemplateCollectionModel values() {
 			return EMPTY_COLLECTION;
 		}
+        @Override
         public KeyValuePairIterator keyValuePairIterator() throws TemplateModelException {
             return Constants.EMPTY_KEY_VALUE_PAIR_ITERATOR;
         }
diff --git a/src/main/java/freemarker/core/DynamicKeyName.java b/src/main/java/freemarker/core/DynamicKeyName.java
index ccb0e7b..b651f38 100644
--- a/src/main/java/freemarker/core/DynamicKeyName.java
+++ b/src/main/java/freemarker/core/DynamicKeyName.java
@@ -335,6 +335,7 @@
                 private boolean elementsBeforeFirsIndexWereSkipped;
                 private int nextIdx;
 
+                @Override
                 public TemplateModel next() throws TemplateModelException {
                     ensureElementsBeforeFirstIndexWereSkipped();
                     if (!rightUnbounded && nextIdx > lastIdx) {
@@ -351,6 +352,7 @@
                     return result;
                 }
 
+                @Override
                 public boolean hasNext() throws TemplateModelException {
                     ensureElementsBeforeFirstIndexWereSkipped();
                     return (rightUnbounded || nextIdx <= lastIdx) && (!rightAdaptive || targetIter.hasNext());
diff --git a/src/main/java/freemarker/core/Environment.java b/src/main/java/freemarker/core/Environment.java
index 1d92161..cd4f783 100644
--- a/src/main/java/freemarker/core/Environment.java
+++ b/src/main/java/freemarker/core/Environment.java
@@ -435,11 +435,13 @@
         if (outArgs.length > 0) {
             pushLocalContext(new LocalContext() {
 
+                @Override
                 public TemplateModel getLocalVariable(String name) {
                     int index = bodyParameterNames.indexOf(name);
                     return index != -1 ? outArgs[index] : null;
                 }
 
+                @Override
                 public Collection getLocalVariableNames() {
                     return bodyParameterNames;
                 }
@@ -706,10 +708,12 @@
             this.lambdaArgValue = lambdaArgValue;
         }
 
+        @Override
         public TemplateModel getLocalVariable(String name) throws TemplateModelException {
             return name.equals(lambdaArgName) ? lambdaArgValue : null;
         }
 
+        @Override
         public Collection getLocalVariableNames() throws TemplateModelException {
             return Collections.singleton(lambdaArgName);
         }
@@ -2602,10 +2606,12 @@
     public TemplateHashModel getDataModel() {
         return rootDataModel instanceof TemplateHashModelEx
                 ? new TemplateHashModelEx() {
+                    @Override
                     public boolean isEmpty() throws TemplateModelException {
                         return false;
                     }
 
+                    @Override
                     public TemplateModel get(String key) throws TemplateModelException {
                         return getDataModelOrSharedVariable(key);
                     }
@@ -2613,23 +2619,28 @@
                     // NB: The methods below do not take into account
                     // configuration shared variables even though
                     // the hash will return them, if only for BWC reasons
+                    @Override
                     public TemplateCollectionModel values() throws TemplateModelException {
                         return ((TemplateHashModelEx) rootDataModel).values();
                     }
 
+                    @Override
                     public TemplateCollectionModel keys() throws TemplateModelException {
                         return ((TemplateHashModelEx) rootDataModel).keys();
                     }
 
+                    @Override
                     public int size() throws TemplateModelException {
                         return ((TemplateHashModelEx) rootDataModel).size();
                     }
                 }
             : new TemplateHashModel() {
+                @Override
                 public boolean isEmpty() {
                     return false;
                 }
 
+                @Override
                 public TemplateModel get(String key) throws TemplateModelException {
                     TemplateModel value = rootDataModel.get(key);
                     return value != null ? value : configuration.getSharedVariable(key);
@@ -2645,10 +2656,12 @@
     public TemplateHashModel getGlobalVariables() {
         return new TemplateHashModel() {
 
+            @Override
             public boolean isEmpty() {
                 return false;
             }
 
+            @Override
             public TemplateModel get(String key) throws TemplateModelException {
                 TemplateModel result = globalNamespace.get(key);
                 if (result == null) {
@@ -3206,6 +3219,7 @@
             this.childBuffer = childBuffer;
         }
 
+        @Override
         public void render(Writer newOut) throws TemplateException, IOException {
             Writer prevOut = out;
             out = newOut;
diff --git a/src/main/java/freemarker/core/ExpressionWithFixedResult.java b/src/main/java/freemarker/core/ExpressionWithFixedResult.java
index 37aee8f..a3bd58e 100644
--- a/src/main/java/freemarker/core/ExpressionWithFixedResult.java
+++ b/src/main/java/freemarker/core/ExpressionWithFixedResult.java
@@ -34,14 +34,17 @@
         this.sourceExpression = sourceExpression;
     }
 
+    @Override
     TemplateModel _eval(Environment env) throws TemplateException {
         return fixedResult;
     }
 
+    @Override
     boolean isLiteral() {
         return sourceExpression.isLiteral();
     }
 
+    @Override
     protected Expression deepCloneWithIdentifierReplaced_inner(String replacedIdentifier, Expression replacement,
             ReplacemenetState replacementState) {
         return new ExpressionWithFixedResult(
@@ -49,22 +52,27 @@
                 sourceExpression.deepCloneWithIdentifierReplaced(replacedIdentifier, replacement, replacementState));
     }
 
+    @Override
     public String getCanonicalForm() {
         return sourceExpression.getCanonicalForm();
     }
 
+    @Override
     String getNodeTypeSymbol() {
         return sourceExpression.getNodeTypeSymbol();
     }
 
+    @Override
     int getParameterCount() {
         return sourceExpression.getParameterCount();
     }
 
+    @Override
     Object getParameterValue(int idx) {
         return sourceExpression.getParameterValue(idx);
     }
 
+    @Override
     ParameterRole getParameterRole(int idx) {
         return sourceExpression.getParameterRole(idx);
     }
diff --git a/src/main/java/freemarker/core/ExtendedDecimalFormatParser.java b/src/main/java/freemarker/core/ExtendedDecimalFormatParser.java
index 8f2da0d..02e0fba 100644
--- a/src/main/java/freemarker/core/ExtendedDecimalFormatParser.java
+++ b/src/main/java/freemarker/core/ExtendedDecimalFormatParser.java
@@ -61,6 +61,7 @@
     static {
         HashMap<String, ParameterHandler> m = new HashMap<>();
         m.put(PARAM_ROUNDING_MODE, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 RoundingMode parsedValue;
@@ -91,6 +92,7 @@
             }
         });
         ParameterHandler multiplierParamHandler = new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 try {
@@ -103,6 +105,7 @@
         m.put(PARAM_MULTIPLIER, multiplierParamHandler);
         m.put(PARAM_MULTIPIER, multiplierParamHandler);
         m.put(PARAM_DECIMAL_SEPARATOR, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 if (value.length() != 1) {
@@ -112,6 +115,7 @@
             }
         });
         m.put(PARAM_MONETARY_DECIMAL_SEPARATOR, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 if (value.length() != 1) {
@@ -121,6 +125,7 @@
             }
         });
         m.put(PARAM_GROUP_SEPARATOR, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 if (value.length() != 1) {
@@ -130,12 +135,14 @@
             }
         });
         m.put(PARAM_EXPONENT_SEPARATOR, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 parser.symbols.setExponentSeparator(value);
             }
         });
         m.put(PARAM_MINUS_SIGN, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 if (value.length() != 1) {
@@ -145,18 +152,21 @@
             }
         });
         m.put(PARAM_INFINITY, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 parser.symbols.setInfinity(value);
             }
         });
         m.put(PARAM_NAN, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 parser.symbols.setNaN(value);
             }
         });
         m.put(PARAM_PERCENT, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 if (value.length() != 1) {
@@ -166,6 +176,7 @@
             }
         });
         m.put(PARAM_PER_MILL, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 if (value.length() != 1) {
@@ -175,6 +186,7 @@
             }
         });
         m.put(PARAM_ZERO_DIGIT, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 if (value.length() != 1) {
@@ -184,6 +196,7 @@
             }
         });
         m.put(PARAM_CURRENCY_CODE, new ParameterHandler() {
+            @Override
             public void handle(ExtendedDecimalFormatParser parser, String value)
                     throws InvalidParameterValueException {
                 Currency currency;
diff --git a/src/main/java/freemarker/core/FreeMarkerTree.java b/src/main/java/freemarker/core/FreeMarkerTree.java
index ed2005f..6d49ea1 100644
--- a/src/main/java/freemarker/core/FreeMarkerTree.java
+++ b/src/main/java/freemarker/core/FreeMarkerTree.java
@@ -76,38 +76,47 @@
             this.element = element;
         }
 
+        @Override
         public Enumeration children() {
             final Enumeration e = element.children();
             return new Enumeration() {
+                @Override
                 public boolean hasMoreElements() {
                     return e.hasMoreElements();
                 }
+                @Override
                 public Object nextElement() {
                     return getNode((TemplateElement) e.nextElement());
                 }
             };
         }
 
+        @Override
         public boolean getAllowsChildren() {
             return element.getAllowsChildren();
         }
 
+        @Override
         public TreeNode getChildAt(int childIndex) {
             return getNode(element.getChildAt(childIndex));
         }
 
+        @Override
         public int getChildCount() {
             return element.getChildCount();
         }
 
+        @Override
         public int getIndex(TreeNode node) {
             return element.getIndex(((TemplateElementTreeNode) node).element);
         }
 
+        @Override
         public TreeNode getParent() {
             return getNode(element.getParentElement());
         }
 
+        @Override
         public boolean isLeaf() {
             return element.isLeaf();
         }
diff --git a/src/main/java/freemarker/core/GetOptionalTemplateMethod.java b/src/main/java/freemarker/core/GetOptionalTemplateMethod.java
index c0e857d..bb4d2f1 100644
--- a/src/main/java/freemarker/core/GetOptionalTemplateMethod.java
+++ b/src/main/java/freemarker/core/GetOptionalTemplateMethod.java
@@ -64,6 +64,7 @@
         this.methodName = "." + builtInVarName;
     }
 
+    @Override
     public Object exec(List args) throws TemplateModelException {
         final int argCnt = args.size();
         if (argCnt < 1 || argCnt > 2) {
@@ -149,6 +150,7 @@
         // conveniently provided like in <@optTemp.include!myDefaultMacro />.
         if (template != null) {
             result.put(RESULT_INCLUDE, new TemplateDirectiveModel() {
+                @Override
                 public void execute(Environment env, Map params, TemplateModel[] loopVars, TemplateDirectiveBody body)
                         throws TemplateException, IOException {
                     if (!params.isEmpty()) {
@@ -165,6 +167,7 @@
                 }
             });
             result.put(RESULT_IMPORT, new TemplateMethodModelEx() {
+                @Override
                 public Object exec(List args) throws TemplateModelException {
                     if (!args.isEmpty()) {
                         throw new TemplateModelException("This method supports no parameters.");
diff --git a/src/main/java/freemarker/core/HashLiteral.java b/src/main/java/freemarker/core/HashLiteral.java
index 7a81b66..f358ba3 100644
--- a/src/main/java/freemarker/core/HashLiteral.java
+++ b/src/main/java/freemarker/core/HashLiteral.java
@@ -146,10 +146,12 @@
             }
         }
 
+        @Override
         public int size() {
             return size;
         }
 
+        @Override
         public TemplateCollectionModel keys() {
             if (keyCollection == null) {
                 // This can only happen when IcI >= 2.3.21, an the map is a LinkedHashMap.
@@ -159,6 +161,7 @@
             return keyCollection;
         }
 
+        @Override
         public TemplateCollectionModel values() {
             if (valueCollection == null) {
                 // This can only happen when IcI >= 2.3.21, an the map is a LinkedHashMap.
@@ -168,10 +171,12 @@
             return valueCollection;
         }
 
+        @Override
         public TemplateModel get(String key) {
             return map.get(key);
         }
 
+        @Override
         public boolean isEmpty() {
             return size == 0;
         }
@@ -181,24 +186,29 @@
             return getCanonicalForm();
         }
 
+        @Override
         public KeyValuePairIterator keyValuePairIterator() throws TemplateModelException {
             return new KeyValuePairIterator() {
                 private final TemplateModelIterator keyIterator = keys().iterator();
                 private final TemplateModelIterator valueIterator = values().iterator();
 
+                @Override
                 public boolean hasNext() throws TemplateModelException {
                     return keyIterator.hasNext();
                 }
 
+                @Override
                 public KeyValuePair next() throws TemplateModelException {
                     return new KeyValuePair() {
                         private final TemplateModel key = keyIterator.next();
                         private final TemplateModel value = valueIterator.next();
 
+                        @Override
                         public TemplateModel getKey() {
                             return key;
                         }
 
+                        @Override
                         public TemplateModel getValue() {
                             return value;
                         }
diff --git a/src/main/java/freemarker/core/IntermediateStreamOperationLikeBuiltIn.java b/src/main/java/freemarker/core/IntermediateStreamOperationLikeBuiltIn.java
index d743d8d..a42d999 100644
--- a/src/main/java/freemarker/core/IntermediateStreamOperationLikeBuiltIn.java
+++ b/src/main/java/freemarker/core/IntermediateStreamOperationLikeBuiltIn.java
@@ -84,14 +84,17 @@
         target.enableLazilyGeneratedResult();
     }
 
+    @Override
     protected List<Expression> getArgumentsAsList() {
         return Collections.singletonList(elementTransformerExp);
     }
 
+    @Override
     protected int getArgumentsCount() {
         return 1;
     }
 
+    @Override
     protected Expression getArgumentParameterValue(int argIdx) {
         if (argIdx != 0) {
             throw new IndexOutOfBoundsException();
@@ -103,6 +106,7 @@
         return elementTransformerExp;
     }
 
+    @Override
     protected void cloneArguments(
             Expression clone, String replacedIdentifier, Expression replacement, ReplacemenetState replacementState) {
         try {
@@ -114,6 +118,7 @@
         }
     }
 
+    @Override
     TemplateModel _eval(Environment env) throws TemplateException {
         TemplateModel targetValue = target.eval(env);
 
@@ -186,6 +191,7 @@
             this.elementTransformerExp = elementTransformerExp;
         }
 
+        @Override
         public TemplateModel transformElement(TemplateModel element, Environment env) throws TemplateException {
             return elementTransformerExp.invokeLambdaDefinedFunction(element, env);
         }
@@ -199,6 +205,7 @@
             this.elementTransformer = elementTransformer;
         }
 
+        @Override
         public TemplateModel transformElement(TemplateModel element, Environment env)
                 throws TemplateModelException {
             Object result = elementTransformer.exec(Collections.singletonList(element));
@@ -216,6 +223,7 @@
             this.elementTransformerExp = elementTransformerExp;
         }
 
+        @Override
         public TemplateModel transformElement(TemplateModel element, Environment env) throws
                 TemplateException {
             // #function-s were originally designed to be called from templates directly, so they expect an
diff --git a/src/main/java/freemarker/core/Interpret.java b/src/main/java/freemarker/core/Interpret.java
index 7252a2f..9b4cb41 100644
--- a/src/main/java/freemarker/core/Interpret.java
+++ b/src/main/java/freemarker/core/Interpret.java
@@ -119,6 +119,7 @@
             this.template = template;
         }
         
+        @Override
         public Writer getWriter(final Writer out, Map args) throws TemplateModelException, IOException {
             try {
                 Environment env = Environment.getCurrentEnvironment();
diff --git a/src/main/java/freemarker/core/IteratorBlock.java b/src/main/java/freemarker/core/IteratorBlock.java
index 14aac31..f9e19c9 100644
--- a/src/main/java/freemarker/core/IteratorBlock.java
+++ b/src/main/java/freemarker/core/IteratorBlock.java
@@ -452,6 +452,7 @@
             return visibleLoopVarName.equals(visibleLoopVar1Name) || visibleLoopVarName.equals(loopVar2Name);
         }
 
+        @Override
         public TemplateModel getLocalVariable(String name) {
             String visibleLoopVar1Name = this.visibleLoopVar1Name; // Not this.loopVar1Name!
             if (visibleLoopVar1Name == null) {
@@ -487,6 +488,7 @@
             return null;
         }
         
+        @Override
         public Collection<String> getLocalVariableNames() {
             String visibleLoopVar1Name = this.visibleLoopVar1Name; // Not this.loopVar1Name!
             if (visibleLoopVar1Name != null) {
diff --git a/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithAlreadyKnownSize.java b/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithAlreadyKnownSize.java
index 99df53f..ef8030a 100644
--- a/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithAlreadyKnownSize.java
+++ b/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithAlreadyKnownSize.java
@@ -30,10 +30,12 @@
         this.size = size;
     }
 
+    @Override
     public int size() throws TemplateModelException {
         return size;
     }
 
+    @Override
     public boolean isEmpty() {
         return size == 0;
     }
diff --git a/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithSameSizeCollEx.java b/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithSameSizeCollEx.java
index 6917273..997a002 100644
--- a/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithSameSizeCollEx.java
+++ b/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithSameSizeCollEx.java
@@ -38,10 +38,12 @@
         this.sizeSourceCollEx = sizeSourceCollEx;
     }
 
+    @Override
     public int size() throws TemplateModelException {
         return sizeSourceCollEx.size();
     }
 
+    @Override
     public boolean isEmpty() throws TemplateModelException {
         return sizeSourceCollEx.isEmpty();
     }
diff --git a/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithSameSizeSeq.java b/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithSameSizeSeq.java
index 15e7c4a..e3ee7e7 100644
--- a/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithSameSizeSeq.java
+++ b/src/main/java/freemarker/core/LazilyGeneratedCollectionModelWithSameSizeSeq.java
@@ -38,10 +38,12 @@
         this.sizeSourceSeq = sizeSourceSeq;
     }
 
+    @Override
     public int size() throws TemplateModelException {
         return sizeSourceSeq.size();
     }
 
+    @Override
     public boolean isEmpty() throws TemplateModelException {
         return sizeSourceSeq.size() == 0;
     }
diff --git a/src/main/java/freemarker/core/LazyCollectionTemplateModelIterator.java b/src/main/java/freemarker/core/LazyCollectionTemplateModelIterator.java
index aa55c26..ffad49b 100644
--- a/src/main/java/freemarker/core/LazyCollectionTemplateModelIterator.java
+++ b/src/main/java/freemarker/core/LazyCollectionTemplateModelIterator.java
@@ -36,11 +36,13 @@
         this.templateCollectionModel = templateCollectionModel;
     }
 
+    @Override
     public TemplateModel next() throws TemplateModelException {
         ensureIteratorInitialized();
         return iterator.next();
     }
 
+    @Override
     public boolean hasNext() throws TemplateModelException {
         ensureIteratorInitialized();
         return iterator.hasNext();
diff --git a/src/main/java/freemarker/core/LazySequenceIterator.java b/src/main/java/freemarker/core/LazySequenceIterator.java
index 8bcf78d..277b52d 100644
--- a/src/main/java/freemarker/core/LazySequenceIterator.java
+++ b/src/main/java/freemarker/core/LazySequenceIterator.java
@@ -38,10 +38,12 @@
         this.sequence = sequence;
 
     }
+    @Override
     public TemplateModel next() throws TemplateModelException {
         return sequence.get(index++);
     }
 
+    @Override
     public boolean hasNext() {
         if (size == null) {
             try {
diff --git a/src/main/java/freemarker/core/LegacyConstructorParserConfiguration.java b/src/main/java/freemarker/core/LegacyConstructorParserConfiguration.java
index a9a1e8e..e2f51b5 100644
--- a/src/main/java/freemarker/core/LegacyConstructorParserConfiguration.java
+++ b/src/main/java/freemarker/core/LegacyConstructorParserConfiguration.java
@@ -57,30 +57,37 @@
         this.arithmeticEngine = arithmeticEngine;
     }
 
+    @Override
     public int getTagSyntax() {
         return tagSyntax;
     }
     
+    @Override
     public int getInterpolationSyntax() {
         return interpolationSyntax;
     }
 
+    @Override
     public int getNamingConvention() {
         return namingConvention;
     }
 
+    @Override
     public boolean getWhitespaceStripping() {
         return whitespaceStripping;
     }
 
+    @Override
     public boolean getStrictSyntaxMode() {
         return strictSyntaxMode;
     }
 
+    @Override
     public Version getIncompatibleImprovements() {
         return incompatibleImprovements;
     }
 
+    @Override
     public ArithmeticEngine getArithmeticEngine() {
         if (arithmeticEngine == null) {
             throw new IllegalStateException();
@@ -94,6 +101,7 @@
         }
     }
 
+    @Override
     public int getAutoEscapingPolicy() {
         if (autoEscapingPolicy == null) {
             throw new IllegalStateException();
@@ -107,6 +115,7 @@
         }
     }
 
+    @Override
     public OutputFormat getOutputFormat() {
         if (outputFormat == null) {
             throw new IllegalStateException();
@@ -120,6 +129,7 @@
         }
     }
 
+    @Override
     public boolean getRecognizeStandardFileExtensions() {
         if (recognizeStandardFileExtensions == null) {
             throw new IllegalStateException();
@@ -133,6 +143,7 @@
         }
     }
 
+    @Override
     public int getTabSize() {
         if (tabSize == null) {
             throw new IllegalStateException();
diff --git a/src/main/java/freemarker/core/ListableRightUnboundedRangeModel.java b/src/main/java/freemarker/core/ListableRightUnboundedRangeModel.java
index b61cf76..c30a868 100644
--- a/src/main/java/freemarker/core/ListableRightUnboundedRangeModel.java
+++ b/src/main/java/freemarker/core/ListableRightUnboundedRangeModel.java
@@ -38,10 +38,12 @@
         super(begin);
     }
 
+    @Override
     public int size() throws TemplateModelException {
         return Integer.MAX_VALUE;
     }
 
+    @Override
     public TemplateModelIterator iterator() throws TemplateModelException {
         return new TemplateModelIterator() {
             boolean needInc;
@@ -50,6 +52,7 @@
             long nextLong;
             BigInteger nextBigInteger;
 
+            @Override
             public TemplateModel next() throws TemplateModelException {
                 if (needInc) {
                     switch (nextType) {
@@ -82,6 +85,7 @@
                         : new SimpleNumber(nextBigInteger)); 
             }
 
+            @Override
             public boolean hasNext() throws TemplateModelException {
                 return true;
             }
diff --git a/src/main/java/freemarker/core/LocalLambdaExpression.java b/src/main/java/freemarker/core/LocalLambdaExpression.java
index 852a934..95a8438 100644
--- a/src/main/java/freemarker/core/LocalLambdaExpression.java
+++ b/src/main/java/freemarker/core/LocalLambdaExpression.java
@@ -52,6 +52,7 @@
         return "->";
     }
 
+    @Override
     TemplateModel _eval(Environment env) throws TemplateException {
         throw new TemplateException("Can't get lambda expression as a value: Lambdas currently can only be used on a " +
                 "few special places.",
diff --git a/src/main/java/freemarker/core/Macro.java b/src/main/java/freemarker/core/Macro.java
index 0279a65..31d621e 100644
--- a/src/main/java/freemarker/core/Macro.java
+++ b/src/main/java/freemarker/core/Macro.java
@@ -399,6 +399,7 @@
             } // if (argsSpecVarDraft != null)
         }
 
+        @Override
         public TemplateModel getLocalVariable(String name) throws TemplateModelException {
              return localVars.get(name);
         }
@@ -414,6 +415,7 @@
             localVars.put(name, var);
         }
 
+        @Override
         public Collection getLocalVariableNames() throws TemplateModelException {
             HashSet result = new HashSet();
             for (TemplateModelIterator it = localVars.keys().iterator(); it.hasNext(); ) {
diff --git a/src/main/java/freemarker/core/MiscUtil.java b/src/main/java/freemarker/core/MiscUtil.java
index 505edb4..b6a2677 100644
--- a/src/main/java/freemarker/core/MiscUtil.java
+++ b/src/main/java/freemarker/core/MiscUtil.java
@@ -43,6 +43,7 @@
         ArrayList res = new ArrayList(map.entrySet());
         Collections.sort(res, 
                 new Comparator() {  // for sorting to source code order
+                    @Override
                     public int compare(Object o1, Object o2) {
                         Map.Entry ent1 = (Map.Entry) o1;
                         Expression exp1 = (Expression) ent1.getValue();
diff --git a/src/main/java/freemarker/core/NewBI.java b/src/main/java/freemarker/core/NewBI.java
index 5d86a85..fa76168 100644
--- a/src/main/java/freemarker/core/NewBI.java
+++ b/src/main/java/freemarker/core/NewBI.java
@@ -73,6 +73,7 @@
             }
         }
 
+        @Override
         public Object exec(List arguments) throws TemplateModelException {
             ObjectWrapper ow = env.getObjectWrapper();
             BeansWrapper bw = 
diff --git a/src/main/java/freemarker/core/NonListableRightUnboundedRangeModel.java b/src/main/java/freemarker/core/NonListableRightUnboundedRangeModel.java
index b03d8f4..3808cff 100644
--- a/src/main/java/freemarker/core/NonListableRightUnboundedRangeModel.java
+++ b/src/main/java/freemarker/core/NonListableRightUnboundedRangeModel.java
@@ -32,6 +32,7 @@
         super(begin);
     }
 
+    @Override
     public int size() throws TemplateModelException {
         return 0;
     }
diff --git a/src/main/java/freemarker/core/NumberLiteral.java b/src/main/java/freemarker/core/NumberLiteral.java
index b2a58d0..2be737f 100644
--- a/src/main/java/freemarker/core/NumberLiteral.java
+++ b/src/main/java/freemarker/core/NumberLiteral.java
@@ -46,6 +46,7 @@
         return env.formatNumberToPlainText(this, this, false);
     }
 
+    @Override
     public Number getAsNumber() {
         return value;
     }
diff --git a/src/main/java/freemarker/core/OptInTemplateClassResolver.java b/src/main/java/freemarker/core/OptInTemplateClassResolver.java
index 94dd4e9..b0e606a 100644
--- a/src/main/java/freemarker/core/OptInTemplateClassResolver.java
+++ b/src/main/java/freemarker/core/OptInTemplateClassResolver.java
@@ -88,6 +88,7 @@
         }
     }
 
+    @Override
     public Class resolve(String className, Environment env, Template template)
     throws TemplateException {
         String templateName = safeGetTemplateName(template);
diff --git a/src/main/java/freemarker/core/RangeModel.java b/src/main/java/freemarker/core/RangeModel.java
index e4f55a2..d7cdeec 100644
--- a/src/main/java/freemarker/core/RangeModel.java
+++ b/src/main/java/freemarker/core/RangeModel.java
@@ -36,6 +36,7 @@
         return begin;
     }
     
+    @Override
     final public TemplateModel get(int index) throws TemplateModelException {
         if (index < 0 || index >= size()) {
             throw new _TemplateModelException("Range item index ", Integer.valueOf(index), " is out of bounds.");
diff --git a/src/main/java/freemarker/core/SequenceIterator.java b/src/main/java/freemarker/core/SequenceIterator.java
index 3c8e84a..02bd0bd 100644
--- a/src/main/java/freemarker/core/SequenceIterator.java
+++ b/src/main/java/freemarker/core/SequenceIterator.java
@@ -34,10 +34,12 @@
         this.size = sequence.size();
 
     }
+    @Override
     public TemplateModel next() throws TemplateModelException {
         return sequence.get(index++);
     }
 
+    @Override
     public boolean hasNext() {
         return index < size;
     }
diff --git a/src/main/java/freemarker/core/SingleIterationCollectionModel.java b/src/main/java/freemarker/core/SingleIterationCollectionModel.java
index f8e8471..fcde865 100644
--- a/src/main/java/freemarker/core/SingleIterationCollectionModel.java
+++ b/src/main/java/freemarker/core/SingleIterationCollectionModel.java
@@ -39,6 +39,7 @@
         this.iterator = iterator;
     }
 
+    @Override
     public TemplateModelIterator iterator() throws TemplateModelException {
         if (iterator == null) {
             throw new IllegalStateException(
diff --git a/src/main/java/freemarker/core/StringArraySequence.java b/src/main/java/freemarker/core/StringArraySequence.java
index 740172d..7bc1d5b 100644
--- a/src/main/java/freemarker/core/StringArraySequence.java
+++ b/src/main/java/freemarker/core/StringArraySequence.java
@@ -40,6 +40,7 @@
         this.stringArray = stringArray;
     }
 
+    @Override
     public TemplateModel get(int index) {
         if (array == null) {
             array = new TemplateScalarModel[stringArray.length];
@@ -52,6 +53,7 @@
         return result;
     }
 
+    @Override
     public int size() {
         return stringArray.length;
     }
diff --git a/src/main/java/freemarker/core/StringLiteral.java b/src/main/java/freemarker/core/StringLiteral.java
index c116498..87507ec 100644
--- a/src/main/java/freemarker/core/StringLiteral.java
+++ b/src/main/java/freemarker/core/StringLiteral.java
@@ -133,6 +133,7 @@
         }
     }
 
+    @Override
     public String getAsString() {
         return value;
     }
diff --git a/src/main/java/freemarker/core/TemplateClassResolver.java b/src/main/java/freemarker/core/TemplateClassResolver.java
index 67c5720..c8a6b48 100644
--- a/src/main/java/freemarker/core/TemplateClassResolver.java
+++ b/src/main/java/freemarker/core/TemplateClassResolver.java
@@ -44,6 +44,7 @@
      */
     TemplateClassResolver UNRESTRICTED_RESOLVER = new TemplateClassResolver() {
 
+        @Override
         public Class resolve(String className, Environment env, Template template)
         throws TemplateException {
             try {
@@ -61,6 +62,7 @@
      */
     TemplateClassResolver SAFER_RESOLVER =  new TemplateClassResolver() {
 
+        @Override
         public Class resolve(String className, Environment env, Template template)
         throws TemplateException {
             if (className.equals(ObjectConstructor.class.getName())
@@ -82,6 +84,7 @@
      */
     TemplateClassResolver ALLOWS_NOTHING_RESOLVER =  new TemplateClassResolver() {
 
+        @Override
         public Class resolve(String className, Environment env, Template template)
         throws TemplateException {
             throw _MessageUtil.newInstantiatingClassNotAllowedException(className, env);
diff --git a/src/main/java/freemarker/core/TemplateConfiguration.java b/src/main/java/freemarker/core/TemplateConfiguration.java
index 84f46ea..92cc671 100644
--- a/src/main/java/freemarker/core/TemplateConfiguration.java
+++ b/src/main/java/freemarker/core/TemplateConfiguration.java
@@ -411,6 +411,7 @@
     /**
      * The getter pair of {@link #setTagSyntax(int)}.
      */
+    @Override
     public int getTagSyntax() {
         return tagSyntax != null ? tagSyntax.intValue() : getNonNullParentConfiguration().getTagSyntax();
     }
@@ -433,6 +434,7 @@
     /**
      * The getter pair of {@link #setInterpolationSyntax(int)}.
      */
+    @Override
     public int getInterpolationSyntax() {
         return interpolationSyntax != null ? interpolationSyntax.intValue()
                 : getNonNullParentConfiguration().getInterpolationSyntax();
@@ -456,6 +458,7 @@
     /**
      * The getter pair of {@link #setNamingConvention(int)}.
      */
+    @Override
     public int getNamingConvention() {
         return namingConvention != null ? namingConvention.intValue()
                 : getNonNullParentConfiguration().getNamingConvention();
@@ -478,6 +481,7 @@
     /**
      * The getter pair of {@link #getWhitespaceStripping()}.
      */
+    @Override
     public boolean getWhitespaceStripping() {
         return whitespaceStripping != null ? whitespaceStripping.booleanValue()
                 : getNonNullParentConfiguration().getWhitespaceStripping();
@@ -501,6 +505,7 @@
     /**
      * The getter pair of {@link #setAutoEscapingPolicy(int)}.
      */
+    @Override
     public int getAutoEscapingPolicy() {
         return autoEscapingPolicy != null ? autoEscapingPolicy.intValue()
                 : getNonNullParentConfiguration().getAutoEscapingPolicy();
@@ -524,6 +529,7 @@
     /**
      * The getter pair of {@link #setOutputFormat(OutputFormat)}.
      */
+    @Override
     public OutputFormat getOutputFormat() {
         return outputFormat != null ? outputFormat : getNonNullParentConfiguration().getOutputFormat();
     }
@@ -545,6 +551,7 @@
     /**
      * Getter pair of {@link #setRecognizeStandardFileExtensions(boolean)}.
      */
+    @Override
     public boolean getRecognizeStandardFileExtensions() {
         return recognizeStandardFileExtensions != null ? recognizeStandardFileExtensions.booleanValue()
                 : getNonNullParentConfiguration().getRecognizeStandardFileExtensions();
@@ -567,6 +574,7 @@
     /**
      * The getter pair of {@link #setStrictSyntaxMode(boolean)}.
      */
+    @Override
     public boolean getStrictSyntaxMode() {
         return strictSyntaxMode != null ? strictSyntaxMode.booleanValue()
                 : getNonNullParentConfiguration().getStrictSyntaxMode();
@@ -625,6 +633,7 @@
      * 
      * @since 2.3.25
      */
+    @Override
     public int getTabSize() {
         return tabSize != null ? tabSize.intValue()
                 : getNonNullParentConfiguration().getTabSize();
@@ -646,6 +655,7 @@
      * @throws IllegalStateException
      *             If the parent configuration wasn't yet set.
      */
+    @Override
     public Version getIncompatibleImprovements() {
         return getNonNullParentConfiguration().getIncompatibleImprovements();
     }
diff --git a/src/main/java/freemarker/core/UnifiedCall.java b/src/main/java/freemarker/core/UnifiedCall.java
index 739021e..5f2d0ba 100644
--- a/src/main/java/freemarker/core/UnifiedCall.java
+++ b/src/main/java/freemarker/core/UnifiedCall.java
@@ -250,6 +250,7 @@
         return res;
     }
 
+    @Override
     @SuppressFBWarnings(value={ "IS2_INCONSISTENT_SYNC", "DC_DOUBLECHECK" }, justification="Performance tricks")
     public Object getOrCreateCustomData(Object providerIdentity, ObjectFactory objectFactory)
             throws CallPlaceCustomDataInitializationException {
@@ -299,6 +300,7 @@
         return customDataHolder;
     }
 
+    @Override
     public boolean isNestedOutputCacheable() {
         return isChildrenOutputCacheable();
     }
diff --git a/src/main/java/freemarker/core/_ArrayEnumeration.java b/src/main/java/freemarker/core/_ArrayEnumeration.java
index 6bb57ba..70d7983 100644
--- a/src/main/java/freemarker/core/_ArrayEnumeration.java
+++ b/src/main/java/freemarker/core/_ArrayEnumeration.java
@@ -35,10 +35,12 @@
         this.nextIndex = 0;
     }
 
+    @Override
     public boolean hasMoreElements() {
         return nextIndex < size;
     }
 
+    @Override
     public Object nextElement() {
         if (nextIndex >= size) {
             throw new NoSuchElementException();
diff --git a/src/main/java/freemarker/core/_ArrayIterator.java b/src/main/java/freemarker/core/_ArrayIterator.java
index 4e5a4f6..f7cca25 100644
--- a/src/main/java/freemarker/core/_ArrayIterator.java
+++ b/src/main/java/freemarker/core/_ArrayIterator.java
@@ -33,10 +33,12 @@
         this.nextIndex = 0;
     }
 
+    @Override
     public boolean hasNext() {
         return nextIndex < array.length;
     }
 
+    @Override
     public Object next() {
         if (nextIndex >= array.length) {
             throw new NoSuchElementException();
@@ -44,6 +46,7 @@
         return array[nextIndex++];
     }
 
+    @Override
     public void remove() {
         throw new UnsupportedOperationException();
     }
diff --git a/src/main/java/freemarker/core/_Java8Impl.java b/src/main/java/freemarker/core/_Java8Impl.java
index fa8b528..a25e0f3 100644
--- a/src/main/java/freemarker/core/_Java8Impl.java
+++ b/src/main/java/freemarker/core/_Java8Impl.java
@@ -34,6 +34,7 @@
         // Not meant to be instantiated
     }    
 
+    @Override
     public boolean isDefaultMethod(Method method) {
         return method.isDefault();
     }
diff --git a/src/main/java/freemarker/core/_ParserConfigurationWithInheritedFormat.java b/src/main/java/freemarker/core/_ParserConfigurationWithInheritedFormat.java
index 72152ce..82d20a0 100644
--- a/src/main/java/freemarker/core/_ParserConfigurationWithInheritedFormat.java
+++ b/src/main/java/freemarker/core/_ParserConfigurationWithInheritedFormat.java
@@ -36,46 +36,57 @@
         this.wrappedPCfg = wrappedPCfg;
     }
 
+    @Override
     public boolean getWhitespaceStripping() {
         return wrappedPCfg.getWhitespaceStripping();
     }
 
+    @Override
     public int getTagSyntax() {
         return wrappedPCfg.getTagSyntax();
     }
 
+    @Override
     public int getInterpolationSyntax() {
         return wrappedPCfg.getInterpolationSyntax();
     }
 
+    @Override
     public boolean getStrictSyntaxMode() {
         return wrappedPCfg.getStrictSyntaxMode();
     }
 
+    @Override
     public OutputFormat getOutputFormat() {
         return outputFormat != null ? outputFormat : wrappedPCfg.getOutputFormat();
     }
 
+    @Override
     public boolean getRecognizeStandardFileExtensions() {
         return false;
     }
 
+    @Override
     public int getNamingConvention() {
         return wrappedPCfg.getNamingConvention();
     }
 
+    @Override
     public Version getIncompatibleImprovements() {
         return wrappedPCfg.getIncompatibleImprovements();
     }
 
+    @Override
     public int getAutoEscapingPolicy() {
         return autoEscapingPolicy != null ? autoEscapingPolicy.intValue() : wrappedPCfg.getAutoEscapingPolicy();
     }
 
+    @Override
     public ArithmeticEngine getArithmeticEngine() {
         return wrappedPCfg.getArithmeticEngine();
     }
 
+    @Override
     public int getTabSize() {
         return wrappedPCfg.getTabSize();
     }
diff --git a/src/main/java/freemarker/core/_UnmodifiableCompositeSet.java b/src/main/java/freemarker/core/_UnmodifiableCompositeSet.java
index da98830..e3b82ab 100644
--- a/src/main/java/freemarker/core/_UnmodifiableCompositeSet.java
+++ b/src/main/java/freemarker/core/_UnmodifiableCompositeSet.java
@@ -52,6 +52,7 @@
         private Iterator<E> it1, it2;
         private boolean it1Deplected;
         
+        @Override
         public boolean hasNext() {
             if (!it1Deplected) {
                 if (it1 == null) {
@@ -69,6 +70,7 @@
             return it2.hasNext();
         }
 
+        @Override
         public E next() {
             if (!it1Deplected) {
                 if (it1 == null) {
@@ -86,6 +88,7 @@
             return it2.next();
         }
 
+        @Override
         public void remove() {
             throw new UnsupportedOperationException();
         }
diff --git a/src/main/java/freemarker/debug/Breakpoint.java b/src/main/java/freemarker/debug/Breakpoint.java
index 8766500..f572d89 100644
--- a/src/main/java/freemarker/debug/Breakpoint.java
+++ b/src/main/java/freemarker/debug/Breakpoint.java
@@ -67,6 +67,7 @@
         return false;
     }
     
+    @Override
     public int compareTo(Object o) {
         Breakpoint b = (Breakpoint) o;
         int r = templateName.compareTo(b.templateName);
diff --git a/src/main/java/freemarker/debug/DebuggerClient.java b/src/main/java/freemarker/debug/DebuggerClient.java
index 49e1340..86c5954 100644
--- a/src/main/java/freemarker/debug/DebuggerClient.java
+++ b/src/main/java/freemarker/debug/DebuggerClient.java
@@ -91,11 +91,13 @@
             this.remoteDebugger = remoteDebugger;
         }
 
+        @Override
         public void addBreakpoint(Breakpoint breakpoint) throws RemoteException {
             remoteDebugger.addBreakpoint(breakpoint);
         }
 
-        public Object addDebuggerListener(DebuggerListener listener) 
+        @Override
+        public Object addDebuggerListener(DebuggerListener listener)
         throws RemoteException {
             if (listener instanceof RemoteObject) {
                 return remoteDebugger.addDebuggerListener(listener);
@@ -106,30 +108,37 @@
             }
         }
 
+        @Override
         public List getBreakpoints() throws RemoteException {
             return remoteDebugger.getBreakpoints();
         }
 
+        @Override
         public List getBreakpoints(String templateName) throws RemoteException {
             return remoteDebugger.getBreakpoints(templateName);
         }
 
+        @Override
         public Collection getSuspendedEnvironments() throws RemoteException {
             return remoteDebugger.getSuspendedEnvironments();
         }
 
+        @Override
         public void removeBreakpoint(Breakpoint breakpoint) throws RemoteException {
             remoteDebugger.removeBreakpoint(breakpoint);
         }
 
+        @Override
         public void removeBreakpoints(String templateName) throws RemoteException {
             remoteDebugger.removeBreakpoints(templateName);
         }
 
+        @Override
         public void removeBreakpoints() throws RemoteException {
             remoteDebugger.removeBreakpoints();
         }
 
+        @Override
         public void removeDebuggerListener(Object id) throws RemoteException {
             remoteDebugger.removeDebuggerListener(id);
         }
diff --git a/src/main/java/freemarker/debug/impl/DebuggerServer.java b/src/main/java/freemarker/debug/impl/DebuggerServer.java
index c98715a..24fef1d 100644
--- a/src/main/java/freemarker/debug/impl/DebuggerServer.java
+++ b/src/main/java/freemarker/debug/impl/DebuggerServer.java
@@ -62,6 +62,7 @@
     public void start() {
         new Thread(new Runnable()
         {
+            @Override
             public void run() {
                 startInternal();
             }
@@ -87,6 +88,7 @@
             this.s = s;
         }
         
+        @Override
         public void run() {
             try {
                 ObjectOutputStream out = new ObjectOutputStream(s.getOutputStream());
diff --git a/src/main/java/freemarker/debug/impl/RmiDebugModelImpl.java b/src/main/java/freemarker/debug/impl/RmiDebugModelImpl.java
index dd009b2..54dd7c8 100644
--- a/src/main/java/freemarker/debug/impl/RmiDebugModelImpl.java
+++ b/src/main/java/freemarker/debug/impl/RmiDebugModelImpl.java
@@ -58,26 +58,32 @@
     private static DebugModel getDebugModel(TemplateModel tm) throws RemoteException {
         return (DebugModel) RmiDebuggedEnvironmentImpl.getCachedWrapperFor(tm);
     }
+    @Override
     public String getAsString() throws TemplateModelException {
         return ((TemplateScalarModel) model).getAsString();
     }
 
+    @Override
     public Number getAsNumber() throws TemplateModelException {
         return ((TemplateNumberModel) model).getAsNumber();
     }
 
+    @Override
     public Date getAsDate() throws TemplateModelException {
         return ((TemplateDateModel) model).getAsDate();
     }
 
+    @Override
     public int getDateType() {
         return ((TemplateDateModel) model).getDateType();
     }
 
+    @Override
     public boolean getAsBoolean() throws TemplateModelException {
         return ((TemplateBooleanModel) model).getAsBoolean();
     }
 
+    @Override
     public int size() throws TemplateModelException {
         if (model instanceof TemplateSequenceModel) {
             return ((TemplateSequenceModel) model).size();
@@ -85,10 +91,12 @@
         return ((TemplateHashModelEx) model).size();
     }
 
+    @Override
     public DebugModel get(int index) throws TemplateModelException, RemoteException {
         return getDebugModel(((TemplateSequenceModel) model).get(index));
     }
     
+    @Override
     public DebugModel[] get(int fromIndex, int toIndex) throws TemplateModelException, RemoteException {
         DebugModel[] dm = new DebugModel[toIndex - fromIndex];
         TemplateSequenceModel s = (TemplateSequenceModel) model;
@@ -98,6 +106,7 @@
         return dm;
     }
 
+    @Override
     public DebugModel[] getCollection() throws TemplateModelException, RemoteException {
         List list = new ArrayList();
         TemplateModelIterator i = ((TemplateCollectionModel) model).iterator();
@@ -107,10 +116,12 @@
         return (DebugModel[]) list.toArray(new DebugModel[list.size()]);
     }
     
+    @Override
     public DebugModel get(String key) throws TemplateModelException, RemoteException {
         return getDebugModel(((TemplateHashModel) model).get(key));
     }
     
+    @Override
     public DebugModel[] get(String[] keys) throws TemplateModelException, RemoteException {
         DebugModel[] dm = new DebugModel[keys.length];
         TemplateHashModel h = (TemplateHashModel) model;
@@ -120,6 +131,7 @@
         return dm;
     }
 
+    @Override
     public String[] keys() throws TemplateModelException {
         TemplateHashModelEx h = (TemplateHashModelEx) model;
         List list = new ArrayList();
@@ -130,6 +142,7 @@
         return (String[]) list.toArray(new String[list.size()]);
     }
 
+    @Override
     public int getModelTypes() {
         return type;
     }
diff --git a/src/main/java/freemarker/debug/impl/RmiDebuggedEnvironmentImpl.java b/src/main/java/freemarker/debug/impl/RmiDebuggedEnvironmentImpl.java
index d80bedf..8719fcb 100644
--- a/src/main/java/freemarker/debug/impl/RmiDebuggedEnvironmentImpl.java
+++ b/src/main/java/freemarker/debug/impl/RmiDebuggedEnvironmentImpl.java
@@ -106,6 +106,7 @@
     }
 
     // TODO See in SuppressFBWarnings
+    @Override
     @SuppressFBWarnings(value="NN_NAKED_NOTIFY", justification="Will have to be re-desigend; postponed.")
     public void resume() {
         synchronized (this) {
@@ -113,11 +114,13 @@
         }
     }
 
+    @Override
     public void stop() {
         stopped = true;
         resume();
     }
 
+    @Override
     public long getId() {
         return id;
     }
@@ -127,14 +130,17 @@
     }
     
     private abstract static class DebugMapModel implements TemplateHashModelEx {
+        @Override
         public int size() {
             return keySet().size();
         }
 
+        @Override
         public TemplateCollectionModel keys() {
             return new SimpleCollection(keySet());
         }
 
+        @Override
         public TemplateCollectionModel values() throws TemplateModelException {
             Collection keys = keySet();
             List list = new ArrayList(keys.size());
@@ -145,6 +151,7 @@
             return new SimpleCollection(list);
         }
 
+        @Override
         public boolean isEmpty() {
             return size() == 0;
         }
@@ -182,6 +189,7 @@
             return KEYS;
         }
         
+        @Override
         public TemplateModel get(String key) throws TemplateModelException {
             String s = configurable.getSetting(key);
             return s == null ? null : new SimpleScalar(s);
@@ -199,6 +207,7 @@
                 return ((Configuration) configurable).getSharedVariableNames();
             }
         
+            @Override
             public TemplateModel get(String key) {
                 return ((Configuration) configurable).getSharedVariable(key);
             }
@@ -280,6 +289,7 @@
                 }
             }
         
+            @Override
             public TemplateModel get(String key) throws TemplateModelException {
                 return ((Environment) configurable).getVariable(key);
             }
diff --git a/src/main/java/freemarker/debug/impl/RmiDebuggerImpl.java b/src/main/java/freemarker/debug/impl/RmiDebuggerImpl.java
index 48d9848..db14ada 100644
--- a/src/main/java/freemarker/debug/impl/RmiDebuggerImpl.java
+++ b/src/main/java/freemarker/debug/impl/RmiDebuggerImpl.java
@@ -43,38 +43,47 @@
         this.service = service;
     }
 
+    @Override
     public void addBreakpoint(Breakpoint breakpoint) {
         service.addBreakpoint(breakpoint);
     }
 
+    @Override
     public Object addDebuggerListener(DebuggerListener listener) {
         return service.addDebuggerListener(listener);
     }
 
+    @Override
     public List getBreakpoints() {
         return service.getBreakpointsSpi();
     }
 
+    @Override
     public List getBreakpoints(String templateName) {
         return service.getBreakpointsSpi(templateName);
     }
 
+    @Override
     public Collection getSuspendedEnvironments() {
         return service.getSuspendedEnvironments();
     }
 
+    @Override
     public void removeBreakpoint(Breakpoint breakpoint) {
         service.removeBreakpoint(breakpoint);
     }
 
+    @Override
     public void removeDebuggerListener(Object id) {
         service.removeDebuggerListener(id);
     }
 
+    @Override
     public void removeBreakpoints() {
         service.removeBreakpoints();
     }
 
+    @Override
     public void removeBreakpoints(String templateName) {
         service.removeBreakpoints(templateName);
     }
diff --git a/src/main/java/freemarker/debug/impl/RmiDebuggerListenerImpl.java b/src/main/java/freemarker/debug/impl/RmiDebuggerListenerImpl.java
index eb3041e..a99a2a3 100644
--- a/src/main/java/freemarker/debug/impl/RmiDebuggerListenerImpl.java
+++ b/src/main/java/freemarker/debug/impl/RmiDebuggerListenerImpl.java
@@ -44,6 +44,7 @@
 
     private final DebuggerListener listener;
 
+    @Override
     public void unreferenced() {
         try {
             UnicastRemoteObject.unexportObject(this, false);
@@ -57,7 +58,8 @@
         this.listener = listener;
     }
 
-    public void environmentSuspended(EnvironmentSuspendedEvent e) 
+    @Override
+    public void environmentSuspended(EnvironmentSuspendedEvent e)
     throws RemoteException {
         listener.environmentSuspended(e);
     }
diff --git a/src/main/java/freemarker/ext/ant/UnlinkedJythonOperationsImpl.java b/src/main/java/freemarker/ext/ant/UnlinkedJythonOperationsImpl.java
index 71a9a48..21584a0 100644
--- a/src/main/java/freemarker/ext/ant/UnlinkedJythonOperationsImpl.java
+++ b/src/main/java/freemarker/ext/ant/UnlinkedJythonOperationsImpl.java
@@ -32,11 +32,13 @@
  */
 public class UnlinkedJythonOperationsImpl implements UnlinkedJythonOperations {
     
+    @Override
     public void execute(String script, Map vars) throws BuildException {
         PythonInterpreter pi = createInterpreter(vars);
         pi.exec(script);
     }
 
+    @Override
     public void execute(File file, Map vars) throws BuildException {
         PythonInterpreter pi = createInterpreter(vars);
         try {
diff --git a/src/main/java/freemarker/ext/beans/ArrayModel.java b/src/main/java/freemarker/ext/beans/ArrayModel.java
index fc92e22..22ea149 100644
--- a/src/main/java/freemarker/ext/beans/ArrayModel.java
+++ b/src/main/java/freemarker/ext/beans/ArrayModel.java
@@ -43,6 +43,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new ArrayModel(object, (BeansWrapper) wrapper);
             }
@@ -69,10 +70,12 @@
     }
 
 
+    @Override
     public TemplateModelIterator iterator() {
         return new Iterator();
     }
 
+    @Override
     public TemplateModel get(int index)
     throws TemplateModelException {
         try {
@@ -89,20 +92,24 @@
         TemplateModelIterator {
         private int position = 0;
 
+        @Override
         public boolean hasNext() {
             return position < length;
         }
 
+        @Override
         public TemplateModel get(int index)
         throws TemplateModelException {
             return ArrayModel.this.get(index);
         }
 
+        @Override
         public TemplateModel next()
         throws TemplateModelException {
             return position < length ? get(position++) : null;
         }
 
+        @Override
         public int size() {
             return ArrayModel.this.size();
         }
diff --git a/src/main/java/freemarker/ext/beans/BeanModel.java b/src/main/java/freemarker/ext/beans/BeanModel.java
index 6a8bd01..e7d0baa 100644
--- a/src/main/java/freemarker/ext/beans/BeanModel.java
+++ b/src/main/java/freemarker/ext/beans/BeanModel.java
@@ -72,6 +72,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new BeanModel(object, (BeansWrapper) wrapper);
             }
@@ -137,6 +138,7 @@
      * @throws TemplateModelException if there was no property nor method nor
      * a generic <tt>get</tt> method to invoke.
      */
+    @Override
     public TemplateModel get(String key)
         throws TemplateModelException {
         Class<?> clazz = object.getClass();
@@ -286,6 +288,7 @@
      * Tells whether the model is empty. It is empty if either the wrapped 
      * object is null, or it's a Boolean with false value.
      */
+    @Override
     public boolean isEmpty() {
         if (object instanceof String) {
             return ((String) object).length() == 0;
@@ -306,22 +309,27 @@
      * Returns the same as {@link #getWrappedObject()}; to ensure that, this method will be final starting from 2.4.
      * This behavior of {@link BeanModel} is assumed by some FreeMarker code. 
      */
+    @Override
     public Object getAdaptedObject(Class<?> hint) {
         return object;  // return getWrappedObject(); starting from 2.4
     }
 
+    @Override
     public Object getWrappedObject() {
         return object;
     }
     
+    @Override
     public int size() {
         return wrapper.getClassIntrospector().keyCount(object.getClass());
     }
 
+    @Override
     public TemplateCollectionModel keys() {
         return new CollectionAndSequence(new SimpleSequence(keySet(), wrapper));
     }
 
+    @Override
     public TemplateCollectionModel values() throws TemplateModelException {
         List<Object> values = new ArrayList<>(size());
         TemplateModelIterator it = keys().iterator();
@@ -363,6 +371,7 @@
         return wrapper.getClassIntrospector().keySet(object.getClass());
     }
 
+    @Override
     public TemplateModel getAPI() throws TemplateModelException {
         return wrapper.wrapAsAPI(object);
     }
diff --git a/src/main/java/freemarker/ext/beans/BeansWrapper.java b/src/main/java/freemarker/ext/beans/BeansWrapper.java
index d72dadc..c321558 100644
--- a/src/main/java/freemarker/ext/beans/BeansWrapper.java
+++ b/src/main/java/freemarker/ext/beans/BeansWrapper.java
@@ -330,6 +330,7 @@
                 bwConf = (BeansWrapperConfiguration) bwConf.clone(false);
                 bwConf.setMethodAppearanceFineTuner(new MethodAppearanceFineTuner() {
 
+                    @Override
                     public void process(
                             MethodAppearanceDecisionInput in, MethodAppearanceDecision out) {
                         BeansWrapper.this.finetuneMethodAppearance(in.getContainingClass(), in.getMethod(), out);
@@ -403,6 +404,7 @@
      * 
      * @since 2.3.21
      */
+    @Override
     public void writeProtect() {
         writeProtected = true;
     }
@@ -410,6 +412,7 @@
     /**
      * @since 2.3.21
      */
+    @Override
     public boolean isWriteProtected() {
         return writeProtected;
     }
@@ -929,6 +932,7 @@
      * <li>otherwise, returns a generic {@link StringModel} for it.
      * </ul>
      */
+    @Override
     public TemplateModel wrap(Object object) throws TemplateModelException {
         if (object == null) return nullModel;
         return modelCache.getInstance(object);
@@ -955,6 +959,7 @@
     /**
      * @since 2.3.22
      */
+    @Override
     public TemplateHashModel wrapAsAPI(Object obj) throws TemplateModelException {
         return new APIModel(obj, this);
     }
@@ -972,18 +977,21 @@
     }
 
     private final ModelFactory BOOLEAN_FACTORY = new ModelFactory() {
+        @Override
         public TemplateModel create(Object object, ObjectWrapper wrapper) {
             return ((Boolean) object).booleanValue() ? trueModel : falseModel; 
         }
     };
 
     private static final ModelFactory ITERATOR_FACTORY = new ModelFactory() {
+        @Override
         public TemplateModel create(Object object, ObjectWrapper wrapper) {
             return new IteratorModel((Iterator<?>) object, (BeansWrapper) wrapper); 
         }
     };
 
     private static final ModelFactory ENUMERATION_FACTORY = new ModelFactory() {
+        @Override
         public TemplateModel create(Object object, ObjectWrapper wrapper) {
             return new EnumerationModel((Enumeration<?>) object, (BeansWrapper) wrapper); 
         }
@@ -1033,6 +1041,7 @@
      * returned unchanged.
      * @throws TemplateModelException if an attempted unwrapping fails.
      */
+    @Override
     public Object unwrap(TemplateModel model) throws TemplateModelException {
         return unwrap(model, Object.class);
     }
@@ -1063,6 +1072,7 @@
     /**
      * @since 2.3.22
      */
+    @Override
     public Object tryUnwrapTo(TemplateModel model, Class<?> targetClass) throws TemplateModelException {
         return tryUnwrapTo(model, targetClass, 0);
     }
diff --git a/src/main/java/freemarker/ext/beans/BeansWrapperBuilder.java b/src/main/java/freemarker/ext/beans/BeansWrapperBuilder.java
index b369e3f..b9a812e 100644
--- a/src/main/java/freemarker/ext/beans/BeansWrapperBuilder.java
+++ b/src/main/java/freemarker/ext/beans/BeansWrapperBuilder.java
@@ -122,6 +122,7 @@
         
         private static final BeansWrapperFactory INSTANCE = new BeansWrapperFactory(); 
 
+        @Override
         public BeansWrapper create(BeansWrapperConfiguration bwConf) {
             return new BeansWrapper(bwConf, true);
         }
diff --git a/src/main/java/freemarker/ext/beans/BooleanModel.java b/src/main/java/freemarker/ext/beans/BooleanModel.java
index 016a221..2f43c97 100644
--- a/src/main/java/freemarker/ext/beans/BooleanModel.java
+++ b/src/main/java/freemarker/ext/beans/BooleanModel.java
@@ -33,6 +33,7 @@
         value = bool.booleanValue();
     }
 
+    @Override
     public boolean getAsBoolean() {
         return value;
     }
diff --git a/src/main/java/freemarker/ext/beans/ClassBasedModelFactory.java b/src/main/java/freemarker/ext/beans/ClassBasedModelFactory.java
index 4d5f009..be79db1 100644
--- a/src/main/java/freemarker/ext/beans/ClassBasedModelFactory.java
+++ b/src/main/java/freemarker/ext/beans/ClassBasedModelFactory.java
@@ -44,6 +44,7 @@
         this.wrapper = wrapper;
     }
 
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         try {
             return getInternal(key);
@@ -133,6 +134,7 @@
         }
     }
 
+    @Override
     public boolean isEmpty() {
         return false;
     }
diff --git a/src/main/java/freemarker/ext/beans/CollectionAdapter.java b/src/main/java/freemarker/ext/beans/CollectionAdapter.java
index efe1c42..8c1e5b9 100644
--- a/src/main/java/freemarker/ext/beans/CollectionAdapter.java
+++ b/src/main/java/freemarker/ext/beans/CollectionAdapter.java
@@ -42,6 +42,7 @@
         this.wrapper = wrapper;
     }
     
+    @Override
     public TemplateModel getTemplateModel() {
         return model;
     }
@@ -57,6 +58,7 @@
             return new Iterator() {
                 final TemplateModelIterator i = model.iterator();
     
+                @Override
                 public boolean hasNext() {
                     try {
                         return i.hasNext();
@@ -65,6 +67,7 @@
                     }
                 }
                 
+                @Override
                 public Object next() {
                     try {
                         return wrapper.unwrap(i.next());
@@ -73,6 +76,7 @@
                     }
                 }
                 
+                @Override
                 public void remove() {
                     throw new UnsupportedOperationException();
                 }
diff --git a/src/main/java/freemarker/ext/beans/CollectionModel.java b/src/main/java/freemarker/ext/beans/CollectionModel.java
index ba79cb2..c86d84d 100644
--- a/src/main/java/freemarker/ext/beans/CollectionModel.java
+++ b/src/main/java/freemarker/ext/beans/CollectionModel.java
@@ -44,6 +44,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new CollectionModel((Collection) object, (BeansWrapper) wrapper);
             }
@@ -67,6 +68,7 @@
      * @throws TemplateModelException if the index is out of bounds, or the
      * underlying collection is not a List.
      */
+    @Override
     public TemplateModel get(int index)
     throws TemplateModelException {
         // Don't forget to keep getSupportsIndexedAccess in sync with this!
@@ -95,6 +97,7 @@
         return object instanceof List;
     }
     
+    @Override
     public TemplateModelIterator iterator() {
         return new IteratorModel(((Collection) object).iterator(), wrapper);
     }
diff --git a/src/main/java/freemarker/ext/beans/DateModel.java b/src/main/java/freemarker/ext/beans/DateModel.java
index aeca3f5..276701e 100644
--- a/src/main/java/freemarker/ext/beans/DateModel.java
+++ b/src/main/java/freemarker/ext/beans/DateModel.java
@@ -39,6 +39,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new DateModel((Date) object, (BeansWrapper) wrapper);
             }
@@ -67,10 +68,12 @@
         }
     }
 
+    @Override
     public Date getAsDate() {
         return (Date) object;
     }
 
+    @Override
     public int getDateType() {
         return type;
     }
diff --git a/src/main/java/freemarker/ext/beans/DefaultMemberAccessPolicy.java b/src/main/java/freemarker/ext/beans/DefaultMemberAccessPolicy.java
index 076dac8..5f0b26c 100644
--- a/src/main/java/freemarker/ext/beans/DefaultMemberAccessPolicy.java
+++ b/src/main/java/freemarker/ext/beans/DefaultMemberAccessPolicy.java
@@ -172,6 +172,7 @@
         return whitelist;
     }
 
+    @Override
     public ClassMemberAccessPolicy forClass(Class<?> contextClass) {
         if (isTypeWithWhitelistRule(contextClass)) {
             return whitelistMemberAccessPolicy.forClass(contextClass);
diff --git a/src/main/java/freemarker/ext/beans/EnumerationModel.java b/src/main/java/freemarker/ext/beans/EnumerationModel.java
index fc34c50..75888bb 100644
--- a/src/main/java/freemarker/ext/beans/EnumerationModel.java
+++ b/src/main/java/freemarker/ext/beans/EnumerationModel.java
@@ -61,6 +61,7 @@
      * This allows the enumeration to be used in a <tt>&lt;#list&gt;</tt> block.
      * @return "this"
      */
+    @Override
     public TemplateModelIterator iterator() throws TemplateModelException {
         synchronized (this) {
             if (accessed) {
@@ -76,6 +77,7 @@
     /**
      * Calls underlying {@link Enumeration#nextElement()}.
      */
+    @Override
     public boolean hasNext() {
         return ((Enumeration) object).hasMoreElements();
     }
@@ -84,6 +86,7 @@
     /**
      * Calls underlying {@link Enumeration#nextElement()} and wraps the result.
      */
+    @Override
     public TemplateModel next()
     throws TemplateModelException {
         try {
diff --git a/src/main/java/freemarker/ext/beans/HashAdapter.java b/src/main/java/freemarker/ext/beans/HashAdapter.java
index 7d20e44..f4f58a0 100644
--- a/src/main/java/freemarker/ext/beans/HashAdapter.java
+++ b/src/main/java/freemarker/ext/beans/HashAdapter.java
@@ -45,6 +45,7 @@
         this.wrapper = wrapper;
     }
     
+    @Override
     public TemplateModel getTemplateModel() {
         return model;
     }
@@ -100,6 +101,7 @@
                     throw new UndeclaredThrowableException(e);
                 }
                 return new Iterator() {
+                    @Override
                     public boolean hasNext() {
                         try {
                             return i.hasNext();
@@ -108,6 +110,7 @@
                         }
                     }
                     
+                    @Override
                     public Object next() {
                         final Object key;
                         try {
@@ -116,14 +119,17 @@
                             throw new UndeclaredThrowableException(e);
                         }
                         return new Map.Entry() {
+                            @Override
                             public Object getKey() {
                                 return key;
                             }
                             
+                            @Override
                             public Object getValue() {
                                 return get(key);
                             }
                             
+                            @Override
                             public Object setValue(Object value) {
                                 throw new UnsupportedOperationException();
                             }
@@ -153,6 +159,7 @@
                         };
                     }
                     
+                    @Override
                     public void remove() {
                         throw new UnsupportedOperationException();
                     }
diff --git a/src/main/java/freemarker/ext/beans/IteratorModel.java b/src/main/java/freemarker/ext/beans/IteratorModel.java
index f21f641..e7aec98 100644
--- a/src/main/java/freemarker/ext/beans/IteratorModel.java
+++ b/src/main/java/freemarker/ext/beans/IteratorModel.java
@@ -65,6 +65,7 @@
      * This allows the iterator to be used in a <tt>&lt;#list&gt;</tt> block.
      * @return "this"
      */
+    @Override
     public TemplateModelIterator iterator() throws TemplateModelException {
         synchronized (this) {
             if (accessed) {
@@ -80,6 +81,7 @@
     /**
      * Calls underlying {@link Iterator#hasNext()}.
      */
+    @Override
     public boolean hasNext() {
         return ((Iterator) object).hasNext();
     }
@@ -88,6 +90,7 @@
     /**
      * Calls underlying {@link Iterator#next()} and wraps the result.
      */
+    @Override
     public TemplateModel next()
     throws TemplateModelException {
         try {
diff --git a/src/main/java/freemarker/ext/beans/JRebelClassChangeNotifier.java b/src/main/java/freemarker/ext/beans/JRebelClassChangeNotifier.java
index 21a39df..2cf81fe 100644
--- a/src/main/java/freemarker/ext/beans/JRebelClassChangeNotifier.java
+++ b/src/main/java/freemarker/ext/beans/JRebelClassChangeNotifier.java
@@ -30,6 +30,7 @@
         ReloaderFactory.getInstance();
     }
 
+    @Override
     public void subscribe(ClassIntrospector classIntrospector) {
         ReloaderFactory.getInstance().addClassReloadListener(
                 new ClassIntrospectorCacheInvalidator(classIntrospector));
@@ -43,6 +44,7 @@
             ref = new WeakReference(w);
         }
 
+        @Override
         public void onClassEvent(int eventType, Class pClass) {
             ClassIntrospector ci = (ClassIntrospector) ref.get();
             if (ci == null) {
diff --git a/src/main/java/freemarker/ext/beans/LegacyDefaultMemberAccessPolicy.java b/src/main/java/freemarker/ext/beans/LegacyDefaultMemberAccessPolicy.java
index ee78292..adff8c2 100644
--- a/src/main/java/freemarker/ext/beans/LegacyDefaultMemberAccessPolicy.java
+++ b/src/main/java/freemarker/ext/beans/LegacyDefaultMemberAccessPolicy.java
@@ -85,6 +85,7 @@
     private LegacyDefaultMemberAccessPolicy() {
     }
 
+    @Override
     public ClassMemberAccessPolicy forClass(Class<?> containingClass) {
         return CLASS_MEMBER_ACCESS_POLICY_INSTANCE;
     }
@@ -98,14 +99,17 @@
             = new BlacklistClassMemberAccessPolicy();
     private static class BlacklistClassMemberAccessPolicy implements ClassMemberAccessPolicy {
 
+        @Override
         public boolean isMethodExposed(Method method) {
             return !UNSAFE_METHODS.contains(method);
         }
 
+        @Override
         public boolean isConstructorExposed(Constructor<?> constructor) {
             return true;
         }
 
+        @Override
         public boolean isFieldExposed(Field field) {
             return true;
         }
diff --git a/src/main/java/freemarker/ext/beans/MapModel.java b/src/main/java/freemarker/ext/beans/MapModel.java
index c672f49..7bb8105 100644
--- a/src/main/java/freemarker/ext/beans/MapModel.java
+++ b/src/main/java/freemarker/ext/beans/MapModel.java
@@ -50,6 +50,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new MapModel((Map) object, (BeansWrapper) wrapper);
             }
@@ -70,6 +71,7 @@
     /**
      * The first argument is used as a key to call the map's <tt>get</tt> method.
      */
+    @Override
     public Object exec(List arguments)
     throws TemplateModelException {
         Object key = unwrap((TemplateModel) arguments.get(0));
diff --git a/src/main/java/freemarker/ext/beans/MemberSelectorListMemberAccessPolicy.java b/src/main/java/freemarker/ext/beans/MemberSelectorListMemberAccessPolicy.java
index f7e2216..2ed2fd4 100644
--- a/src/main/java/freemarker/ext/beans/MemberSelectorListMemberAccessPolicy.java
+++ b/src/main/java/freemarker/ext/beans/MemberSelectorListMemberAccessPolicy.java
@@ -328,8 +328,10 @@
         }
     }
 
+    @Override
     public final ClassMemberAccessPolicy forClass(final Class<?> contextClass) {
         return new ClassMemberAccessPolicy() {
+            @Override
             public boolean isMethodExposed(Method method) {
                 return matchResultToIsExposedResult(
                         methodMatcher.matches(contextClass, method)
@@ -338,6 +340,7 @@
                                         != null);
             }
 
+            @Override
             public boolean isConstructorExposed(Constructor<?> constructor) {
                 return matchResultToIsExposedResult(
                         constructorMatcher.matches(contextClass, constructor)
@@ -346,6 +349,7 @@
                                         != null);
             }
 
+            @Override
             public boolean isFieldExposed(Field field) {
                 return matchResultToIsExposedResult(
                         fieldMatcher.matches(contextClass, field)
diff --git a/src/main/java/freemarker/ext/beans/NumberModel.java b/src/main/java/freemarker/ext/beans/NumberModel.java
index 4e6e679..c3b6449 100644
--- a/src/main/java/freemarker/ext/beans/NumberModel.java
+++ b/src/main/java/freemarker/ext/beans/NumberModel.java
@@ -37,6 +37,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new NumberModel((Number) object, (BeansWrapper) wrapper);
             }
@@ -53,6 +54,7 @@
         super(number, wrapper);
     }
 
+    @Override
     public Number getAsNumber() {
         return (Number) object;
     }
diff --git a/src/main/java/freemarker/ext/beans/OverloadedMethodsModel.java b/src/main/java/freemarker/ext/beans/OverloadedMethodsModel.java
index 9fe4362..fc53dde 100644
--- a/src/main/java/freemarker/ext/beans/OverloadedMethodsModel.java
+++ b/src/main/java/freemarker/ext/beans/OverloadedMethodsModel.java
@@ -54,6 +54,7 @@
      * @throws TemplateModelException if the method cannot be chosen
      * unambiguously.
      */
+    @Override
     public Object exec(List arguments)
     throws TemplateModelException {
         MemberAndArguments maa = overloadedMethods.getMemberAndArguments(arguments, wrapper);
@@ -69,11 +70,13 @@
         }
     }
 
+    @Override
     public TemplateModel get(int index) throws TemplateModelException {
         return (TemplateModel) exec(Collections.singletonList(
                 new SimpleNumber(Integer.valueOf(index))));
     }
 
+    @Override
     public int size() throws TemplateModelException {
         throw new TemplateModelException("?size is unsupported for " + getClass().getName());
     }
diff --git a/src/main/java/freemarker/ext/beans/OverloadedNumberUtil.java b/src/main/java/freemarker/ext/beans/OverloadedNumberUtil.java
index fbb2fc0..243a935 100644
--- a/src/main/java/freemarker/ext/beans/OverloadedNumberUtil.java
+++ b/src/main/java/freemarker/ext/beans/OverloadedNumberUtil.java
@@ -383,6 +383,7 @@
 
         // We have to implement this, so that if a potential matching method expects a Comparable, which is implemented
         // by all the supported numerical types, the "Or" type will be a match. 
+        @Override
         public int compareTo(Object o) {
             Number n = getSourceNumber();
             if (n instanceof Comparable) {
diff --git a/src/main/java/freemarker/ext/beans/ResourceBundleModel.java b/src/main/java/freemarker/ext/beans/ResourceBundleModel.java
index f6ff899..4b2b0fb 100644
--- a/src/main/java/freemarker/ext/beans/ResourceBundleModel.java
+++ b/src/main/java/freemarker/ext/beans/ResourceBundleModel.java
@@ -60,6 +60,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new ResourceBundleModel((ResourceBundle) object, (BeansWrapper) wrapper);
             }
@@ -116,6 +117,7 @@
      * with this key, then applies a MessageFormat.format on the string with the
      * rest of the arguments. The created MessageFormats are cached for later reuse.
      */
+    @Override
     public Object exec(List arguments)
         throws TemplateModelException {
         // Must have at least one argument - the key
diff --git a/src/main/java/freemarker/ext/beans/SequenceAdapter.java b/src/main/java/freemarker/ext/beans/SequenceAdapter.java
index 340a754..48655da 100644
--- a/src/main/java/freemarker/ext/beans/SequenceAdapter.java
+++ b/src/main/java/freemarker/ext/beans/SequenceAdapter.java
@@ -38,6 +38,7 @@
         this.wrapper = wrapper;
     }
     
+    @Override
     public TemplateModel getTemplateModel() {
         return model;
     }
diff --git a/src/main/java/freemarker/ext/beans/SimpleMapModel.java b/src/main/java/freemarker/ext/beans/SimpleMapModel.java
index 587888c..03690f1 100644
--- a/src/main/java/freemarker/ext/beans/SimpleMapModel.java
+++ b/src/main/java/freemarker/ext/beans/SimpleMapModel.java
@@ -50,6 +50,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new SimpleMapModel((Map) object, (BeansWrapper) wrapper);
             }
@@ -62,6 +63,7 @@
         this.map = map;
     }
 
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         Object val = map.get(key);
         if (val == null) {
@@ -79,6 +81,7 @@
         return wrap(val);
     }
     
+    @Override
     public Object exec(List args) throws TemplateModelException {
         Object key = ((BeansWrapper) getObjectWrapper()).unwrap((TemplateModel) args.get(0));
         Object value = map.get(key);
@@ -88,34 +91,42 @@
         return wrap(value);
     }
 
+    @Override
     public boolean isEmpty() {
         return map.isEmpty();
     }
 
+    @Override
     public int size() {
         return map.size();
     }
 
+    @Override
     public TemplateCollectionModel keys() {
         return new CollectionAndSequence(new SimpleSequence(map.keySet(), getObjectWrapper()));
     }
 
+    @Override
     public TemplateCollectionModel values() {
         return new CollectionAndSequence(new SimpleSequence(map.values(), getObjectWrapper()));
     }
     
+    @Override
     public KeyValuePairIterator keyValuePairIterator() {
         return new MapKeyValuePairIterator(map, getObjectWrapper());
     }
 
+    @Override
     public Object getAdaptedObject(Class hint) {
         return map;
     }
     
+    @Override
     public Object getWrappedObject() {
         return map;
     }
 
+    @Override
     public TemplateModel getAPI() throws TemplateModelException {
         return ((RichObjectWrapper) getObjectWrapper()).wrapAsAPI(map);
     }
diff --git a/src/main/java/freemarker/ext/beans/SimpleMethodModel.java b/src/main/java/freemarker/ext/beans/SimpleMethodModel.java
index 9b8150b..d38ab06 100644
--- a/src/main/java/freemarker/ext/beans/SimpleMethodModel.java
+++ b/src/main/java/freemarker/ext/beans/SimpleMethodModel.java
@@ -66,6 +66,7 @@
     /**
      * Invokes the method, passing it the arguments from the list.
      */
+    @Override
     public Object exec(List arguments)
         throws TemplateModelException {
         try {
@@ -78,11 +79,13 @@
         }
     }
     
+    @Override
     public TemplateModel get(int index) throws TemplateModelException {
         return (TemplateModel) exec(Collections.singletonList(
                 new SimpleNumber(Integer.valueOf(index))));
     }
 
+    @Override
     public int size() throws TemplateModelException {
         throw new _TemplateModelException(
                 new _ErrorDescriptionBuilder(
@@ -103,6 +106,7 @@
     /**
      * Implementation of experimental interface; don't use it, no backward compatibility guarantee!
      */
+    @Override
     public Object[] explainTypeError(Class[] expectedClasses) {
         final Member member = getMember();
         if (!(member instanceof Method)) {
diff --git a/src/main/java/freemarker/ext/beans/StaticModel.java b/src/main/java/freemarker/ext/beans/StaticModel.java
index f2f182f..bfbccb9 100644
--- a/src/main/java/freemarker/ext/beans/StaticModel.java
+++ b/src/main/java/freemarker/ext/beans/StaticModel.java
@@ -56,6 +56,7 @@
      * Returns the field or method named by the <tt>key</tt>
      * parameter.
      */
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         Object model = map.get(key);
         // Simple method, overloaded method or final field -- these have cached 
@@ -80,18 +81,22 @@
      * Returns true if there is at least one public static
      * field or method in the underlying class.
      */
+    @Override
     public boolean isEmpty() {
         return map.isEmpty();
     }
 
+    @Override
     public int size() {
         return map.size();
     }
     
+    @Override
     public TemplateCollectionModel keys() throws TemplateModelException {
         return (TemplateCollectionModel) wrapper.getOuterIdentity().wrap(map.keySet());
     }
     
+    @Override
     public TemplateCollectionModel values() throws TemplateModelException {
         return (TemplateCollectionModel) wrapper.getOuterIdentity().wrap(map.values());
     }
diff --git a/src/main/java/freemarker/ext/beans/StringModel.java b/src/main/java/freemarker/ext/beans/StringModel.java
index 37a4923..b53872d 100644
--- a/src/main/java/freemarker/ext/beans/StringModel.java
+++ b/src/main/java/freemarker/ext/beans/StringModel.java
@@ -34,6 +34,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new StringModel(object, (BeansWrapper) wrapper);
             }
diff --git a/src/main/java/freemarker/ext/dom/AttributeNodeModel.java b/src/main/java/freemarker/ext/dom/AttributeNodeModel.java
index 0575cc3..2ae1740 100644
--- a/src/main/java/freemarker/ext/dom/AttributeNodeModel.java
+++ b/src/main/java/freemarker/ext/dom/AttributeNodeModel.java
@@ -30,10 +30,12 @@
         super(att);
     }
     
+    @Override
     public String getAsString() {
         return ((Attr) node).getValue();
     }
     
+    @Override
     public String getNodeName() {
         String result = node.getLocalName();
         if (result == null || result.equals("")) {
@@ -42,6 +44,7 @@
         return result;
     }
     
+    @Override
     public boolean isEmpty() {
         return true;
     }
diff --git a/src/main/java/freemarker/ext/dom/CharacterDataNodeModel.java b/src/main/java/freemarker/ext/dom/CharacterDataNodeModel.java
index 6f6c53a..42d3f32 100644
--- a/src/main/java/freemarker/ext/dom/CharacterDataNodeModel.java
+++ b/src/main/java/freemarker/ext/dom/CharacterDataNodeModel.java
@@ -30,14 +30,17 @@
         super(text);
     }
     
+    @Override
     public String getAsString() {
         return ((org.w3c.dom.CharacterData) node).getData();
     }
     
+    @Override
     public String getNodeName() {
         return (node instanceof Comment) ? "@comment" : "@text";
     }
     
+    @Override
     public boolean isEmpty() {
         return true;
     }
diff --git a/src/main/java/freemarker/ext/dom/DocumentModel.java b/src/main/java/freemarker/ext/dom/DocumentModel.java
index 63783dd..2bf75b8 100644
--- a/src/main/java/freemarker/ext/dom/DocumentModel.java
+++ b/src/main/java/freemarker/ext/dom/DocumentModel.java
@@ -40,6 +40,7 @@
         super(doc);
     }
     
+    @Override
     public String getNodeName() {
         return "@document";
     }
@@ -69,6 +70,7 @@
         return rootElement;
     }
     
+    @Override
     public boolean isEmpty() {
         return false;
     }
diff --git a/src/main/java/freemarker/ext/dom/DocumentTypeModel.java b/src/main/java/freemarker/ext/dom/DocumentTypeModel.java
index 5a52231..7ce0053 100644
--- a/src/main/java/freemarker/ext/dom/DocumentTypeModel.java
+++ b/src/main/java/freemarker/ext/dom/DocumentTypeModel.java
@@ -45,10 +45,12 @@
         throw new TemplateModelException("accessing properties of a DTD is not currently supported");
     }
     
+    @Override
     public String getNodeName() {
         return "@document_type$" + node.getNodeName();
     }
     
+    @Override
     public boolean isEmpty() {
         return true;
     }
diff --git a/src/main/java/freemarker/ext/dom/ElementModel.java b/src/main/java/freemarker/ext/dom/ElementModel.java
index 3f140c1..0975352 100644
--- a/src/main/java/freemarker/ext/dom/ElementModel.java
+++ b/src/main/java/freemarker/ext/dom/ElementModel.java
@@ -40,6 +40,7 @@
         super(element);
     }
     
+    @Override
     public boolean isEmpty() {
         return false;
     }
@@ -127,6 +128,7 @@
         }
     }
 
+    @Override
     public String getAsString() throws TemplateModelException {
         NodeList nl = node.getChildNodes();
         String result = "";
@@ -146,6 +148,7 @@
         return result;
     }
     
+    @Override
     public String getNodeName() {
         String result = node.getLocalName();
         if (result == null || result.equals("")) {
diff --git a/src/main/java/freemarker/ext/dom/JaxenXPathSupport.java b/src/main/java/freemarker/ext/dom/JaxenXPathSupport.java
index eda4b87..77b35ab 100644
--- a/src/main/java/freemarker/ext/dom/JaxenXPathSupport.java
+++ b/src/main/java/freemarker/ext/dom/JaxenXPathSupport.java
@@ -76,6 +76,7 @@
         // [2.4] Can't we just use Collections.emptyList()? 
     private final static ArrayList EMPTY_ARRAYLIST = new ArrayList();
 
+    @Override
     public TemplateModel executeQuery(Object context, String xpathQuery) throws TemplateModelException {
         try {
             BaseXPath xpath;
@@ -111,6 +112,7 @@
 
     static private final NamespaceContext customNamespaceContext = new NamespaceContext() {
         
+        @Override
         public String translateNamespacePrefixToUri(String prefix) {
             if (prefix.equals(Template.DEFAULT_NAMESPACE_PREFIX)) {
                 return Environment.getCurrentEnvironment().getDefaultNS();
@@ -120,6 +122,7 @@
     };
 
     private static final VariableContext FM_VARIABLE_CONTEXT = new VariableContext() {
+        @Override
         public Object getVariableValue(String namespaceURI, String prefix, String localName)
         throws UnresolvableException {
             try {
@@ -222,6 +225,7 @@
     private static class FmEntityResolver implements EntityResolver {
         private int callCount = 0;
         
+        @Override
         public InputSource resolveEntity(String publicId, String systemId)
         throws SAXException, IOException {
             ++callCount;
diff --git a/src/main/java/freemarker/ext/dom/NodeListModel.java b/src/main/java/freemarker/ext/dom/NodeListModel.java
index fdd5d0e..700f43b 100644
--- a/src/main/java/freemarker/ext/dom/NodeListModel.java
+++ b/src/main/java/freemarker/ext/dom/NodeListModel.java
@@ -58,6 +58,7 @@
     XPathSupport xpathSupport;
     
     private static final ObjectWrapper NODE_WRAPPER = new ObjectWrapper() {
+        @Override
         public TemplateModel wrap(Object obj) {
             if (obj instanceof NodeModel) {
                 return (NodeModel) obj;
@@ -114,10 +115,12 @@
         return result;
     }
     
+    @Override
     public boolean isEmpty() {
         return size() == 0;
     }
     
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         int size = size();
         if (size == 1) {
@@ -200,6 +203,7 @@
         return xpathSupport;
     }
 
+    @Override
     public Object[] explainTypeError(Class[] expectedClasses) {
         for (int i = 0; i < expectedClasses.length; i++) {
             Class expectedClass = expectedClasses[i];
diff --git a/src/main/java/freemarker/ext/dom/NodeModel.java b/src/main/java/freemarker/ext/dom/NodeModel.java
index 720cb35..d2bb2b4 100644
--- a/src/main/java/freemarker/ext/dom/NodeModel.java
+++ b/src/main/java/freemarker/ext/dom/NodeModel.java
@@ -297,6 +297,7 @@
         return node;
     }
     
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         if (key.startsWith("@@")) {
             if (key.equals(AtAtKey.TEXT.getKey())) {
@@ -343,6 +344,7 @@
         }
     }
     
+    @Override
     public TemplateNodeModel getParentNode() {
         if (parent == null) {
             Node parentNode = node.getParentNode();
@@ -356,14 +358,17 @@
         return parent;
     }
 
+    @Override
     public TemplateNodeModelEx getPreviousSibling() throws TemplateModelException {
         return wrap(node.getPreviousSibling());
     }
 
+    @Override
     public TemplateNodeModelEx getNextSibling() throws TemplateModelException {
         return wrap(node.getNextSibling());
     }
 
+    @Override
     public TemplateSequenceModel getChildNodes() {
         if (children == null) {
             children = new NodeListModel(node.getChildNodes(), this);
@@ -371,6 +376,7 @@
         return children;
     }
     
+    @Override
     public final String getNodeType() throws TemplateModelException {
         short nodeType = node.getNodeType();
         switch (nodeType) {
@@ -406,14 +412,17 @@
     /**
      * Always returns 1.
      */
+    @Override
     public final int size() {
         return 1;
     }
     
+    @Override
     public final TemplateModel get(int i) {
         return i == 0 ? this : null;
     }
     
+    @Override
     public String getNodeNamespace() {
         int nodeType = node.getNodeType();
         if (nodeType != Node.ATTRIBUTE_NODE && nodeType != Node.ELEMENT_NODE) { 
@@ -756,14 +765,17 @@
         return getNodeName();
     }
     
+    @Override
     public Object getAdaptedObject(Class hint) {
         return node;
     }
     
+    @Override
     public Object getWrappedObject() {
         return node;
     }
     
+    @Override
     public Object[] explainTypeError(Class[] expectedClasses) {
         for (int i = 0; i < expectedClasses.length; i++) {
             Class expectedClass = expectedClasses[i];
diff --git a/src/main/java/freemarker/ext/dom/PINodeModel.java b/src/main/java/freemarker/ext/dom/PINodeModel.java
index 1e7e8a3..b5cfd3a 100644
--- a/src/main/java/freemarker/ext/dom/PINodeModel.java
+++ b/src/main/java/freemarker/ext/dom/PINodeModel.java
@@ -29,14 +29,17 @@
         super(pi);
     }
     
+    @Override
     public String getAsString() {
         return ((ProcessingInstruction) node).getData();
     }
     
+    @Override
     public String getNodeName() {
         return "@pi$" + ((ProcessingInstruction) node).getTarget();
     }
     
+    @Override
     public boolean isEmpty() {
         return true;
     }
diff --git a/src/main/java/freemarker/ext/dom/SunInternalXalanXPathSupport.java b/src/main/java/freemarker/ext/dom/SunInternalXalanXPathSupport.java
index e184ac9..1198fbb 100644
--- a/src/main/java/freemarker/ext/dom/SunInternalXalanXPathSupport.java
+++ b/src/main/java/freemarker/ext/dom/SunInternalXalanXPathSupport.java
@@ -54,6 +54,7 @@
 
     private XPathContext xpathContext = new XPathContext();
         
+    @Override
     synchronized public TemplateModel executeQuery(Object context, String xpathQuery) throws TemplateModelException {
         if (!(context instanceof Node)) {
             if (context == null || isNodeList(context)) {
@@ -110,10 +111,12 @@
     
     private static final PrefixResolver CUSTOM_PREFIX_RESOLVER = new PrefixResolver() {
         
+        @Override
         public String getNamespaceForPrefix(String prefix, Node node) {
             return getNamespaceForPrefix(prefix);
         }
         
+        @Override
         public String getNamespaceForPrefix(String prefix) {
             if (prefix.equals(Template.DEFAULT_NAMESPACE_PREFIX)) {
                 return Environment.getCurrentEnvironment().getDefaultNS();
@@ -121,10 +124,12 @@
             return Environment.getCurrentEnvironment().getNamespaceForPrefix(prefix);
         }
         
+        @Override
         public String getBaseIdentifier() {
             return null;
         }
         
+        @Override
         public boolean handlesNullPrefixes() {
             return false;
         }
diff --git a/src/main/java/freemarker/ext/dom/XalanXPathSupport.java b/src/main/java/freemarker/ext/dom/XalanXPathSupport.java
index 59ec81c..aa3ec7d 100644
--- a/src/main/java/freemarker/ext/dom/XalanXPathSupport.java
+++ b/src/main/java/freemarker/ext/dom/XalanXPathSupport.java
@@ -50,6 +50,7 @@
     
     private XPathContext xpathContext = new XPathContext();
         
+    @Override
     synchronized public TemplateModel executeQuery(Object context, String xpathQuery) throws TemplateModelException {
         if (!(context instanceof Node)) {
             if (context == null || isNodeList(context)) {
@@ -105,10 +106,12 @@
     
     private static final PrefixResolver CUSTOM_PREFIX_RESOLVER = new PrefixResolver() {
         
+        @Override
         public String getNamespaceForPrefix(String prefix, Node node) {
             return getNamespaceForPrefix(prefix);
         }
         
+        @Override
         public String getNamespaceForPrefix(String prefix) {
             if (prefix.equals(Template.DEFAULT_NAMESPACE_PREFIX)) {
                 return Environment.getCurrentEnvironment().getDefaultNS();
@@ -116,10 +119,12 @@
             return Environment.getCurrentEnvironment().getNamespaceForPrefix(prefix);
         }
         
+        @Override
         public String getBaseIdentifier() {
             return null;
         }
         
+        @Override
         public boolean handlesNullPrefixes() {
             return false;
         }
diff --git a/src/main/java/freemarker/ext/jdom/NodeListModel.java b/src/main/java/freemarker/ext/jdom/NodeListModel.java
index ef44832..7e963f7 100644
--- a/src/main/java/freemarker/ext/jdom/NodeListModel.java
+++ b/src/main/java/freemarker/ext/jdom/NodeListModel.java
@@ -182,6 +182,7 @@
     /**
      * Returns true if this model contains no nodes.
      */
+    @Override
     public boolean isEmpty() {
         return nodes.isEmpty();
     }
@@ -193,6 +194,7 @@
      * simplifies creating XML-transformation templates, as to output a node contained
      * in variable x as XML fragment, you simply write ${x} in the template.
      */
+    @Override
     public String getAsString()
     throws TemplateModelException {
         if (isEmpty())
@@ -347,6 +349,7 @@
      * @param key a key that identifies a required set of nodes
      * @return a new NodeListModel that represents the requested set of nodes.
      */
+    @Override
     public TemplateModel get(String key)
     throws TemplateModelException {
         if (isEmpty())
@@ -483,15 +486,18 @@
         return new SimpleScalar(buf.toString());
     }
 
+    @Override
     public TemplateModelIterator iterator() {
         return new TemplateModelIterator()
         {
             private final Iterator it = nodes.iterator();
 
+            @Override
             public TemplateModel next() {
                 return it.hasNext() ? new NodeListModel(it.next(), namespaces) : null;
             }
 
+            @Override
             public boolean hasNext() {
                 return it.hasNext();
             }
@@ -501,6 +507,7 @@
     /**
      * Retrieves the i-th element of the node list.
      */
+    @Override
     public TemplateModel get(int i)
     throws TemplateModelException {
         try {
@@ -510,6 +517,7 @@
         }
     }
     
+    @Override
     public int size() {
         return nodes.size();
     }
@@ -531,6 +539,7 @@
      * @return a NodeListModel representing the nodes that are the result of application
      * of the XPath to the current node list.
      */
+    @Override
     public Object exec(List arguments)
     throws TemplateModelException {
         if (arguments == null || arguments.size() != 1)
@@ -594,6 +603,7 @@
     }
 
     private static final class AllChildrenOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             if (node instanceof Element)
                 return((Element) node).getChildren();
@@ -612,6 +622,7 @@
     }
 
     private static final class NamedChildrenOp implements NamedNodeOperator {
+        @Override
         public List operate(Object node, String localName, Namespace namespace) {
             if (node instanceof Element) {
                 return((Element) node).getChildren(localName, namespace);
@@ -635,6 +646,7 @@
     }
 
     private static final class AllAttributesOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
  // With 2.1 semantics it  makes more sense to just return a null and let the core 
  // throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
@@ -650,6 +662,7 @@
     }
 
     private static final class NamedAttributeOp implements NamedNodeOperator {
+        @Override
         public List operate(Object node, String localName, Namespace namespace) {
             Attribute attr = null;
             if (node instanceof Element) {
@@ -686,6 +699,7 @@
     }
 
     private static final class NameOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             if (node instanceof Element)
                 return Collections.singletonList(((Element) node).getName());
@@ -706,6 +720,7 @@
     }
 
     private static final class QNameOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             if (node instanceof Element)
                 return Collections.singletonList(((Element) node).getQualifiedName());
@@ -719,6 +734,7 @@
     }
 
     private static final class NamespaceUriOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             if (node instanceof Element)
                 return Collections.singletonList(((Element) node).getNamespace().getURI());
@@ -732,6 +748,7 @@
     }
 
     private static final class NamespacePrefixOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             if (node instanceof Element)
                 return Collections.singletonList(((Element) node).getNamespace().getPrefix());
@@ -745,6 +762,7 @@
     }
 
     private static final class CanonicalNameOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             if (node instanceof Element) {
                 Element element = (Element) node;
@@ -782,6 +800,7 @@
     }
 
     private static final class ParentOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             Element parent = getParent(node);
             return parent == null ? Collections.EMPTY_LIST : Collections.singletonList(parent);
@@ -789,6 +808,7 @@
     }
 
     private static final class AncestorOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             Element parent = getParent(node);
             if (parent == null) return Collections.EMPTY_LIST;
@@ -802,6 +822,7 @@
     }
 
     private static final class AncestorOrSelfOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             Element parent = getParent(node);
             if (parent == null) return Collections.singletonList(node);
@@ -816,6 +837,7 @@
     }
 
     private static class DescendantOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             LinkedList list = new LinkedList();
             if (node instanceof Element) {
@@ -854,6 +876,7 @@
     }
 
     private static final class DocumentOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             Document doc = null;
             if (node instanceof Element)
@@ -883,6 +906,7 @@
     }
 
     private static final class DocTypeOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             if (node instanceof Document) {
                 DocType doctype = ((Document) node).getDocType();
@@ -896,6 +920,7 @@
     }
 
     private static final class ContentOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             if (node instanceof Element)
                 return((Element) node).getContent();
@@ -909,6 +934,7 @@
     }
 
     private static final class TextOp implements NodeOperator {
+        @Override
         public List operate(Object node) {
             if (node instanceof Element)
                 return Collections.singletonList(((Element) node).getTextTrim());
@@ -1043,6 +1069,7 @@
             return false;
         }
 
+        @Override
         public Object exec(List arguments)
         throws TemplateModelException {
             if (arguments.size() != 2)
@@ -1059,6 +1086,7 @@
             return false;
         }
 
+        @Override
         public Object exec(List arguments) {
             Set names = new HashSet(arguments);
             List list = new LinkedList(nodes);
@@ -1089,6 +1117,7 @@
             return false;
         }
 
+        @Override
         public Object exec(List arguments)
         throws TemplateModelException {
             if (arguments == null || arguments.size() == 0)
@@ -1186,6 +1215,7 @@
                 this.namespaces = namespaces;
             }
             
+            @Override
             public String translateNamespacePrefixToUri(String prefix) {
                 // Empty prefix always maps to empty URL in XPath
                 if (prefix.length() == 0) {
diff --git a/src/main/java/freemarker/ext/jsp/CustomTagAndELFunctionCombiner.java b/src/main/java/freemarker/ext/jsp/CustomTagAndELFunctionCombiner.java
index 8cf493e..0863ba4 100644
--- a/src/main/java/freemarker/ext/jsp/CustomTagAndELFunctionCombiner.java
+++ b/src/main/java/freemarker/ext/jsp/CustomTagAndELFunctionCombiner.java
@@ -104,23 +104,28 @@
             this.simpleMethodModel = simpleMethodModel;
         }
 
+        @Override
         public Object exec(List arguments) throws TemplateModelException {
             return simpleMethodModel.exec(arguments);
         }
 
+        @Override
         public void execute(Environment env, Map params, TemplateModel[] loopVars, TemplateDirectiveBody body)
                 throws TemplateException, IOException {
             templateDirectiveModel.execute(env, params, loopVars, body);
         }
 
+        @Override
         public Object[] explainTypeError(Class[] expectedClasses) {
             return simpleMethodModel.explainTypeError(expectedClasses);
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return simpleMethodModel.get(index);
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return simpleMethodModel.size();
         }
@@ -139,10 +144,12 @@
             this.templateMethodModelEx = templateMethodModelEx;
         }
 
+        @Override
         public Object exec(List arguments) throws TemplateModelException {
             return templateMethodModelEx.exec(arguments);
         }
 
+        @Override
         public void execute(Environment env, Map params, TemplateModel[] loopVars, TemplateDirectiveBody body)
                 throws TemplateException, IOException {
             templateDirectiveModel.execute(env, params, loopVars, body);
@@ -162,10 +169,12 @@
             this.templateMethodModelEx = templateMethodModelEx;
         }
 
+        @Override
         public Object exec(List arguments) throws TemplateModelException {
             return templateMethodModelEx.exec(arguments);
         }
 
+        @Override
         public Writer getWriter(Writer out, Map args) throws TemplateModelException, IOException {
             return templateTransformModel.getWriter(out, args);
         }
@@ -185,22 +194,27 @@
             this.simpleMethodModel = simpleMethodModel;
         }
 
+        @Override
         public Object exec(List arguments) throws TemplateModelException {
             return simpleMethodModel.exec(arguments);
         }
 
+        @Override
         public Object[] explainTypeError(Class[] expectedClasses) {
             return simpleMethodModel.explainTypeError(expectedClasses);
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return simpleMethodModel.get(index);
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return simpleMethodModel.size();
         }
 
+        @Override
         public Writer getWriter(Writer out, Map args) throws TemplateModelException, IOException {
             return templateTransformModel.getWriter(out, args);
         }
diff --git a/src/main/java/freemarker/ext/jsp/EventForwarding.java b/src/main/java/freemarker/ext/jsp/EventForwarding.java
index 770ef5e..ce2dad6 100644
--- a/src/main/java/freemarker/ext/jsp/EventForwarding.java
+++ b/src/main/java/freemarker/ext/jsp/EventForwarding.java
@@ -97,6 +97,7 @@
         }
     }
     
+    @Override
     public void attributeAdded(ServletContextAttributeEvent arg0) {
         synchronized (servletContextAttributeListeners) {
             int s = servletContextAttributeListeners.size();
@@ -106,6 +107,7 @@
         }
     }
 
+    @Override
     public void attributeRemoved(ServletContextAttributeEvent arg0) {
         synchronized (servletContextAttributeListeners) {
             int s = servletContextAttributeListeners.size();
@@ -115,6 +117,7 @@
         }
     }
 
+    @Override
     public void attributeReplaced(ServletContextAttributeEvent arg0) {
         synchronized (servletContextAttributeListeners) {
             int s = servletContextAttributeListeners.size();
@@ -124,6 +127,7 @@
         }
     }
 
+    @Override
     public void contextInitialized(ServletContextEvent arg0) {
         arg0.getServletContext().setAttribute(ATTR_NAME, this);
         
@@ -135,6 +139,7 @@
         }
     }
 
+    @Override
     public void contextDestroyed(ServletContextEvent arg0) {
         synchronized (servletContextListeners) {
             int s = servletContextListeners.size();
@@ -144,6 +149,7 @@
         }
     }
 
+    @Override
     public void sessionCreated(HttpSessionEvent arg0) {
         synchronized (httpSessionListeners) {
             int s = httpSessionListeners.size();
@@ -153,6 +159,7 @@
         }
     }
 
+    @Override
     public void sessionDestroyed(HttpSessionEvent arg0) {
         synchronized (httpSessionListeners) {
             int s = httpSessionListeners.size();
@@ -162,6 +169,7 @@
         }
     }
 
+    @Override
     public void attributeAdded(HttpSessionBindingEvent arg0) {
         synchronized (httpSessionAttributeListeners) {
             int s = httpSessionAttributeListeners.size();
@@ -171,6 +179,7 @@
         }
     }
 
+    @Override
     public void attributeRemoved(HttpSessionBindingEvent arg0) {
         synchronized (httpSessionAttributeListeners) {
             int s = httpSessionAttributeListeners.size();
@@ -180,6 +189,7 @@
         }
     }
 
+    @Override
     public void attributeReplaced(HttpSessionBindingEvent arg0) {
         synchronized (httpSessionAttributeListeners) {
             int s = httpSessionAttributeListeners.size();
diff --git a/src/main/java/freemarker/ext/jsp/FreeMarkerJspApplicationContext.java b/src/main/java/freemarker/ext/jsp/FreeMarkerJspApplicationContext.java
index 4160f0d..f83dae1 100644
--- a/src/main/java/freemarker/ext/jsp/FreeMarkerJspApplicationContext.java
+++ b/src/main/java/freemarker/ext/jsp/FreeMarkerJspApplicationContext.java
@@ -63,6 +63,7 @@
         elResolver.add(new ScopedAttributeELResolver());
     }
     
+    @Override
     public void addELContextListener(ELContextListener listener) {
         synchronized (listeners) {
             listeners.addLast(listener);
@@ -99,10 +100,12 @@
         return null;
     }
 
+    @Override
     public void addELResolver(ELResolver resolver) {
         additionalResolvers.add(resolver);
     }
 
+    @Override
     public ExpressionFactory getExpressionFactory() {
         return expressionFactoryImpl;
     }
diff --git a/src/main/java/freemarker/ext/jsp/FreeMarkerJspFactory2.java b/src/main/java/freemarker/ext/jsp/FreeMarkerJspFactory2.java
index f4205e4..2eed561 100644
--- a/src/main/java/freemarker/ext/jsp/FreeMarkerJspFactory2.java
+++ b/src/main/java/freemarker/ext/jsp/FreeMarkerJspFactory2.java
@@ -23,6 +23,7 @@
 /**
  */
 class FreeMarkerJspFactory2 extends FreeMarkerJspFactory {
+    @Override
     protected String getSpecificationVersion() {
         return "2.0";
     }
diff --git a/src/main/java/freemarker/ext/jsp/FreeMarkerPageContext.java b/src/main/java/freemarker/ext/jsp/FreeMarkerPageContext.java
index 0ff0a1d..724ba83 100644
--- a/src/main/java/freemarker/ext/jsp/FreeMarkerPageContext.java
+++ b/src/main/java/freemarker/ext/jsp/FreeMarkerPageContext.java
@@ -473,6 +473,7 @@
             it = hashEx.keys().iterator();
         }
         
+        @Override
         public boolean hasMoreElements() {
             try {
                 return it.hasNext();
@@ -481,6 +482,7 @@
             }
         }
         
+        @Override
         public Object nextElement() {
             try {
                 return ((TemplateScalarModel) it.next()).getAsString();
diff --git a/src/main/java/freemarker/ext/jsp/FreemarkerTag.java b/src/main/java/freemarker/ext/jsp/FreemarkerTag.java
index 48ea69f..6868cfd 100644
--- a/src/main/java/freemarker/ext/jsp/FreemarkerTag.java
+++ b/src/main/java/freemarker/ext/jsp/FreemarkerTag.java
@@ -61,40 +61,49 @@
         this.name = name == null ? "" : name;
     }
     
+    @Override
     public Tag getParent() {
         return parent;
     }
 
+    @Override
     public void setParent(Tag parent) {
         this.parent = parent;
     }
 
+    @Override
     public int doStartTag() {
         return EVAL_BODY_BUFFERED;
     }
 
+    @Override
     public void setBodyContent(BodyContent bodyContent) {
         this.bodyContent = bodyContent;
     }
 
+    @Override
     public void setPageContext(PageContext pageContext) {
         this.pageContext = pageContext;
         root = null;
     }
 
+    @Override
     public void doInitBody() {
     }
 
+    @Override
     public int doAfterBody() {
         return SKIP_BODY;
     }
 
+    @Override
     public void release() {
         root = null;
         template = null;
         name = "";
     }
 
+    @Override
     public int doEndTag()
         throws JspException {
         if (bodyContent == null)
diff --git a/src/main/java/freemarker/ext/jsp/JspContextModel.java b/src/main/java/freemarker/ext/jsp/JspContextModel.java
index bd824f0..0eb10da 100644
--- a/src/main/java/freemarker/ext/jsp/JspContextModel.java
+++ b/src/main/java/freemarker/ext/jsp/JspContextModel.java
@@ -47,11 +47,13 @@
         this.scope = scope;
     }
 
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         Object bean = scope == ANY_SCOPE ? pageContext.findAttribute(key) : pageContext.getAttribute(key, scope);
         return BeansWrapper.getDefaultInstance().wrap(bean);
     }
 
+    @Override
     public boolean isEmpty() {
         return false;
     }
diff --git a/src/main/java/freemarker/ext/jsp/SimpleTagDirectiveModel.java b/src/main/java/freemarker/ext/jsp/SimpleTagDirectiveModel.java
index e02e4c9..6101b06 100644
--- a/src/main/java/freemarker/ext/jsp/SimpleTagDirectiveModel.java
+++ b/src/main/java/freemarker/ext/jsp/SimpleTagDirectiveModel.java
@@ -52,7 +52,8 @@
         }
     }
 
-    public void execute(Environment env, Map args, TemplateModel[] outArgs, 
+    @Override
+    public void execute(Environment env, Map args, TemplateModel[] outArgs,
             final TemplateDirectiveBody body) 
     throws TemplateException, IOException {
         try {
@@ -107,6 +108,7 @@
             super("Nested content has thrown template exception", cause);
         }
         
+        @Override
         public TemplateException getCause() {
             return (TemplateException) super.getCause();
         }
diff --git a/src/main/java/freemarker/ext/jsp/TagTransformModel.java b/src/main/java/freemarker/ext/jsp/TagTransformModel.java
index 55b0272..a4c17c7 100644
--- a/src/main/java/freemarker/ext/jsp/TagTransformModel.java
+++ b/src/main/java/freemarker/ext/jsp/TagTransformModel.java
@@ -59,6 +59,7 @@
         isTryCatchFinally = TryCatchFinally.class.isAssignableFrom(tagClass);
     }
     
+    @Override
     public Writer getWriter(Writer out, Map args) throws TemplateModelException {
         try {
             Tag tag = (Tag) getTagInstance();
@@ -314,6 +315,7 @@
             return pageContext;
         }
         
+        @Override
         public int onStart()
         throws TemplateModelException {
             try {
@@ -352,6 +354,7 @@
             }
         }
         
+        @Override
         public int afterBody()
         throws TemplateModelException {
             try {
@@ -384,6 +387,7 @@
             }
         }
         
+        @Override
         public void onError(Throwable t) throws Throwable {
             if (isTryCatchFinally) {
                 ((TryCatchFinally) tag).doCatch(t);
diff --git a/src/main/java/freemarker/ext/jsp/TaglibFactory.java b/src/main/java/freemarker/ext/jsp/TaglibFactory.java
index c9b8d92..0dfa9b6 100644
--- a/src/main/java/freemarker/ext/jsp/TaglibFactory.java
+++ b/src/main/java/freemarker/ext/jsp/TaglibFactory.java
@@ -175,6 +175,7 @@
      *         custom tag or EL function from the library, implemented as a {@link TemplateTransformModel} or
      *         {@link TemplateMethodModelEx}, respectively.
      */
+    @Override
     public TemplateModel get(final String taglibUri) throws TemplateModelException {
         synchronized (lock) {
             {
@@ -287,6 +288,7 @@
     /**
      * Returns false.
      */
+    @Override
     public boolean isEmpty() {
         return false;
     }
@@ -742,6 +744,7 @@
             }
             File[] tldFiles = dir.listFiles(new FilenameFilter() {
     
+                @Override
                 public boolean accept(File urlAsFile, String name) {
                     return isTldFileNameIgnoreCase(name);
                 }
@@ -1201,6 +1204,7 @@
             this.fileResourcePath = fileResourcePath;
         }
     
+        @Override
         public InputStream getInputStream() throws IOException {
             final InputStream in = servletContext.getResourceAsStream(fileResourcePath);
             if (in == null) {
@@ -1209,6 +1213,7 @@
             return in;
         }
     
+        @Override
         public String getXmlSystemId() throws IOException {
             final URL url = servletContext.getResource(fileResourcePath);
             return url != null ? url.toExternalForm() : null;
@@ -1245,6 +1250,7 @@
             return "classpath:" + resourcePath;
         }
     
+        @Override
         public InputStream getInputStream() throws IOException {
             ClassLoader tccl = tryGetThreadContextClassLoader();
             if (tccl != null) {
@@ -1257,6 +1263,7 @@
             return ClassUtil.getReasourceAsStream(getClass(), resourcePath, false);
         }
 
+        @Override
         public String getXmlSystemId() throws IOException {
             ClassLoader tccl = tryGetThreadContextClassLoader();
             if (tccl != null) {
@@ -1294,6 +1301,7 @@
             this.entryPath = entryPath != null ? normalizeJarEntryPath(entryPath, false) : null;
         }
 
+        @Override
         public InputStream getInputStream() throws IOException {
             if (entryUrl != null) {
                 try {
@@ -1368,6 +1376,7 @@
             }
         }
     
+        @Override
         public String getXmlSystemId() {
             return entryUrl != null ? entryUrl.toExternalForm() : null;
         }
@@ -1403,6 +1412,7 @@
             super(
                     tryCreateServletContextJarEntryUrl(servletContext, servletContextJarFilePath, entryPath),
                     new InputStreamFactory() {
+                        @Override
                         public InputStream getInputStream() {
                             return servletContext.getResourceAsStream(servletContextJarFilePath);
                         }
@@ -1425,10 +1435,12 @@
             this.file = file;
         }
 
+        @Override
         public InputStream getInputStream() throws IOException {
             return new FileInputStream(file);
         }
 
+        @Override
         public String getXmlSystemId() throws IOException {
             return file.toURI().toURL().toExternalForm();
         }
@@ -1447,10 +1459,12 @@
             tagsAndFunctions = parseToTagsAndFunctions(ctx, tldPath, wrapper);
         }
 
+        @Override
         public TemplateModel get(String key) {
             return (TemplateModel) tagsAndFunctions.get(key);
         }
 
+        @Override
         public boolean isEmpty() {
             return tagsAndFunctions.isEmpty();
         }
@@ -1844,6 +1858,7 @@
      */
     private static final class EmptyContentEntityResolver implements EntityResolver {
         
+        @Override
         public InputSource resolveEntity(String publicId, String systemId) {
             InputSource is = new InputSource(new ByteArrayInputStream(new byte[0]));
             is.setPublicId(publicId);
@@ -1961,6 +1976,7 @@
             return "URLWithExternalForm(" + externalForm + ")";
         }
 
+        @Override
         public int compareTo(Object that) {
             return this.getExternalForm().compareTo(((URLWithExternalForm) that).getExternalForm());
         }
diff --git a/src/main/java/freemarker/ext/jsp/_FreeMarkerPageContext2.java b/src/main/java/freemarker/ext/jsp/_FreeMarkerPageContext2.java
index b7df303..d2fa19d 100644
--- a/src/main/java/freemarker/ext/jsp/_FreeMarkerPageContext2.java
+++ b/src/main/java/freemarker/ext/jsp/_FreeMarkerPageContext2.java
@@ -57,6 +57,7 @@
      * to work you <b>must</b> have the Apache Commons-EL package in the classpath. If
      * Commons-EL is not available, this method will throw an UnsupportedOperationException. 
      */
+    @Override
     public ExpressionEvaluator getExpressionEvaluator() {
         try {
             Class type = Thread.currentThread().getContextClassLoader().loadClass
@@ -74,10 +75,12 @@
      * the page scope, request scope, session scope and application scope for an
      * attribute with a matching name.
      */
+    @Override
     public VariableResolver getVariableResolver() {
         final PageContext ctx = this;
 
         return new VariableResolver() {
+            @Override
             public Object resolveVariable(String name) throws ELException {
                 return ctx.findAttribute(name);
             }
@@ -87,6 +90,7 @@
     /**
      * Includes the specified path. The flush argument is ignored!
      */
+    @Override
     public void include(String path, boolean flush) throws IOException, ServletException {
         super.include(path);
     }
diff --git a/src/main/java/freemarker/ext/jsp/_FreeMarkerPageContext21.java b/src/main/java/freemarker/ext/jsp/_FreeMarkerPageContext21.java
index 998a5b0..d99e22c 100644
--- a/src/main/java/freemarker/ext/jsp/_FreeMarkerPageContext21.java
+++ b/src/main/java/freemarker/ext/jsp/_FreeMarkerPageContext21.java
@@ -67,6 +67,7 @@
         try {
             Class type = ((ClassLoader) AccessController.doPrivileged(
                     new PrivilegedAction() {
+                        @Override
                         public Object run() {
                             return Thread.currentThread().getContextClassLoader();
                         }
@@ -90,6 +91,7 @@
         final PageContext ctx = this;
 
         return new VariableResolver() {
+            @Override
             public Object resolveVariable(String name) throws ELException {
                 return ctx.findAttribute(name);
             }
diff --git a/src/main/java/freemarker/ext/jython/JythonHashModel.java b/src/main/java/freemarker/ext/jython/JythonHashModel.java
index 1a3e8df..cf06a9a 100644
--- a/src/main/java/freemarker/ext/jython/JythonHashModel.java
+++ b/src/main/java/freemarker/ext/jython/JythonHashModel.java
@@ -53,6 +53,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new JythonHashModel((PyObject) object, (JythonWrapper) wrapper);
             }
@@ -65,6 +66,7 @@
     /**
      * Returns {@link PyObject#__len__()}.
      */
+    @Override
     public int size() throws TemplateModelException {
         try {
             return object.__len__();
@@ -77,6 +79,7 @@
      * Returns either <code>object.__findattr__("keys").__call__()</code>
      * or <code>object.__findattr__("keySet").__call__()</code>.
      */
+    @Override
     public TemplateCollectionModel keys() throws TemplateModelException {
         try {
             PyObject method = object.__findattr__(KEYS);
@@ -97,6 +100,7 @@
     /**
      * Returns <code>object.__findattr__("values").__call__()</code>.
      */
+    @Override
     public TemplateCollectionModel values() throws TemplateModelException {
         try {
             PyObject method = object.__findattr__(VALUES);
diff --git a/src/main/java/freemarker/ext/jython/JythonModel.java b/src/main/java/freemarker/ext/jython/JythonModel.java
index 0438e2a..1ba588c 100644
--- a/src/main/java/freemarker/ext/jython/JythonModel.java
+++ b/src/main/java/freemarker/ext/jython/JythonModel.java
@@ -49,6 +49,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new JythonModel((PyObject) object, (JythonWrapper) wrapper);
             }
@@ -62,6 +63,7 @@
     /**
      * Returns the value of {@link PyObject#__nonzero__()}.
      */
+    @Override
     public boolean getAsBoolean() throws TemplateModelException {
         try {
             return object.__nonzero__();
@@ -73,6 +75,7 @@
     /**
      * Returns the value of {@link Object#toString()}.
      */
+    @Override
     public String getAsString() throws TemplateModelException {
         try {
             return object.toString();
@@ -88,6 +91,7 @@
      * with <code>false</code>, the order of calls is reversed (that is, item
      * lookup takes precedence over attribute lookup).
      */
+    @Override
     public TemplateModel get(String key)
     throws TemplateModelException {
         if (key != null) {
@@ -118,6 +122,7 @@
     /**
      * Returns {@link PyObject#__len__()}<code> == 0</code>.
      */
+    @Override
     public boolean isEmpty() throws TemplateModelException {
         try {
             return object.__len__() == 0;
@@ -129,6 +134,7 @@
     /**
      * @see freemarker.template.TemplateMethodModel#exec(List)
      */
+    @Override
     public Object exec(List arguments) throws TemplateModelException {
         int size = arguments.size();
         try {
@@ -159,6 +165,7 @@
         }
     }
 
+    @Override
     public Object getAdaptedObject(Class hint) {
         if (object == null) {
             return null;
@@ -170,6 +177,7 @@
         return view;
     }
     
+    @Override
     public Object getWrappedObject() {
         return object == null ? null : object.__tojava__(Object.class);
     }
diff --git a/src/main/java/freemarker/ext/jython/JythonNumberModel.java b/src/main/java/freemarker/ext/jython/JythonNumberModel.java
index a784b62..8d5a56e 100644
--- a/src/main/java/freemarker/ext/jython/JythonNumberModel.java
+++ b/src/main/java/freemarker/ext/jython/JythonNumberModel.java
@@ -41,6 +41,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new JythonNumberModel((PyObject) object, (JythonWrapper) wrapper);
             }
@@ -55,6 +56,7 @@
      * {@link java.lang.Number}.class as argument. If that fails, returns 
      * {@link PyObject#__float__()}.
      */
+    @Override
     public Number getAsNumber() throws TemplateModelException {
         try {
             Object value = object.__tojava__(java.lang.Number.class);
diff --git a/src/main/java/freemarker/ext/jython/JythonSequenceModel.java b/src/main/java/freemarker/ext/jython/JythonSequenceModel.java
index e92ed62..f5e37e2 100644
--- a/src/main/java/freemarker/ext/jython/JythonSequenceModel.java
+++ b/src/main/java/freemarker/ext/jython/JythonSequenceModel.java
@@ -42,6 +42,7 @@
     static final ModelFactory FACTORY =
         new ModelFactory()
         {
+            @Override
             public TemplateModel create(Object object, ObjectWrapper wrapper) {
                 return new JythonSequenceModel((PyObject) object, (JythonWrapper) wrapper);
             }
@@ -54,6 +55,7 @@
     /**
      * Returns {@link PyObject#__finditem__(int)}.
      */
+    @Override
     public TemplateModel get(int index) throws TemplateModelException {
         try {
             return wrapper.wrap(object.__finditem__(index));
@@ -65,6 +67,7 @@
     /**
      * Returns {@link PyObject#__len__()}.
      */
+    @Override
     public int size() throws TemplateModelException {
         try {
             return object.__len__();
@@ -73,15 +76,18 @@
         }
     }
 
+    @Override
     public TemplateModelIterator iterator() {
         return new TemplateModelIterator()
         {
             int i = 0;
             
+            @Override
             public boolean hasNext() throws TemplateModelException {
                 return i < size();
             }
 
+            @Override
             public TemplateModel next() throws TemplateModelException {
                 return get(i++);
             }
diff --git a/src/main/java/freemarker/ext/jython/JythonWrapper.java b/src/main/java/freemarker/ext/jython/JythonWrapper.java
index fa3b575..6ca7229 100644
--- a/src/main/java/freemarker/ext/jython/JythonWrapper.java
+++ b/src/main/java/freemarker/ext/jython/JythonWrapper.java
@@ -106,6 +106,7 @@
      * #unwrap(TemplateModel)}, the template model that was passed to
      * <code>unwrap</code> is returned.
      */
+    @Override
     public TemplateModel wrap(Object obj) {
         if (obj == null) {
             return null;
@@ -176,6 +177,7 @@
             this.model = model;
         }
         
+        @Override
         public TemplateModel getTemplateModel() {
             return model;
         }
diff --git a/src/main/java/freemarker/ext/jython/_Jython20And21VersionAdapter.java b/src/main/java/freemarker/ext/jython/_Jython20And21VersionAdapter.java
index ddda4f0..fe16dc0 100644
--- a/src/main/java/freemarker/ext/jython/_Jython20And21VersionAdapter.java
+++ b/src/main/java/freemarker/ext/jython/_Jython20And21VersionAdapter.java
@@ -30,14 +30,17 @@
  */
 public class _Jython20And21VersionAdapter extends JythonVersionAdapter {
 
+    @Override
     public boolean isPyInstance(Object obj) {
         return obj instanceof PyJavaInstance;
     }
 
+    @Override
     public Object pyInstanceToJava(Object pyInstance) {
         return ((PyJavaInstance) pyInstance).__tojava__(java.lang.Object.class);
     }
 
+    @Override
     public String getPythonClassName(PyObject pyObject) {
         return pyObject.__class__.__name__;
     }
diff --git a/src/main/java/freemarker/ext/jython/_Jython22VersionAdapter.java b/src/main/java/freemarker/ext/jython/_Jython22VersionAdapter.java
index 26277da..62f2e78 100644
--- a/src/main/java/freemarker/ext/jython/_Jython22VersionAdapter.java
+++ b/src/main/java/freemarker/ext/jython/_Jython22VersionAdapter.java
@@ -30,14 +30,17 @@
  */
 public class _Jython22VersionAdapter extends JythonVersionAdapter {
 
+    @Override
     public boolean isPyInstance(Object obj) {
         return obj instanceof PyJavaInstance;
     }
 
+    @Override
     public Object pyInstanceToJava(Object pyInstance) {
         return ((PyJavaInstance) pyInstance).__tojava__(java.lang.Object.class);
     }
 
+    @Override
     public String getPythonClassName(PyObject pyObject) {
         return pyObject.getType().getFullName();
     }
diff --git a/src/main/java/freemarker/ext/rhino/RhinoFunctionModel.java b/src/main/java/freemarker/ext/rhino/RhinoFunctionModel.java
index 9827d1b..405059d 100644
--- a/src/main/java/freemarker/ext/rhino/RhinoFunctionModel.java
+++ b/src/main/java/freemarker/ext/rhino/RhinoFunctionModel.java
@@ -44,6 +44,7 @@
         this.fnThis = fnThis;
     }
     
+    @Override
     public Object exec(List arguments) throws TemplateModelException {
         Context cx = Context.getCurrentContext();
         Object[] args = arguments.toArray();
diff --git a/src/main/java/freemarker/ext/rhino/RhinoScriptableModel.java b/src/main/java/freemarker/ext/rhino/RhinoScriptableModel.java
index 76761d6..1efacbc 100644
--- a/src/main/java/freemarker/ext/rhino/RhinoScriptableModel.java
+++ b/src/main/java/freemarker/ext/rhino/RhinoScriptableModel.java
@@ -45,6 +45,7 @@
 TemplateSequenceModel, AdapterTemplateModel, TemplateScalarModel, 
 TemplateBooleanModel, TemplateNumberModel {
     static final ModelFactory FACTORY = new ModelFactory() {
+        @Override
         public TemplateModel create(Object object, ObjectWrapper wrapper) {
             return new RhinoScriptableModel((Scriptable) object, 
                     (BeansWrapper) wrapper);
@@ -59,6 +60,7 @@
         this.wrapper = wrapper;
     }
     
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         Object retval = ScriptableObject.getProperty(scriptable, key);
         if (retval instanceof Function) {
@@ -68,6 +70,7 @@
         }
     }
     
+    @Override
     public TemplateModel get(int index) throws TemplateModelException {
         Object retval = ScriptableObject.getProperty(scriptable, index);
         if (retval instanceof Function) {
@@ -77,18 +80,22 @@
         }
     }
     
+    @Override
     public boolean isEmpty() {
         return scriptable.getIds().length == 0;
     }
     
+    @Override
     public TemplateCollectionModel keys() throws TemplateModelException {
         return (TemplateCollectionModel) wrapper.wrap(scriptable.getIds());
     }
     
+    @Override
     public int size() {
         return scriptable.getIds().length;
     }
     
+    @Override
     public TemplateCollectionModel values() throws TemplateModelException {
         Object[] ids = scriptable.getIds();
         Object[] values = new Object[ids.length];
@@ -105,14 +112,17 @@
         return (TemplateCollectionModel) wrapper.wrap(values);
     }
     
+    @Override
     public boolean getAsBoolean() {
         return Context.toBoolean(scriptable);
     }
     
+    @Override
     public Number getAsNumber() {
         return Double.valueOf(Context.toNumber(scriptable));
     }
     
+    @Override
     public String getAsString() {
         return Context.toString(scriptable);
     }
@@ -125,6 +135,7 @@
         return wrapper;
     }
 
+    @Override
     public Object getAdaptedObject(Class hint) {
         // FIXME: This does LS3 conversion, which is not very useful for us. Like it won't convert to List, Map, etc.  
         try {
diff --git a/src/main/java/freemarker/ext/rhino/RhinoWrapper.java b/src/main/java/freemarker/ext/rhino/RhinoWrapper.java
index b5dd3c5..359750b 100644
--- a/src/main/java/freemarker/ext/rhino/RhinoWrapper.java
+++ b/src/main/java/freemarker/ext/rhino/RhinoWrapper.java
@@ -43,6 +43,7 @@
     static {
         try {
             UNDEFINED_INSTANCE = AccessController.doPrivileged(new PrivilegedExceptionAction() {
+                @Override
                 public Object run() throws Exception {
                     return Undefined.class.getField("instance").get(null);
                 }
diff --git a/src/main/java/freemarker/ext/servlet/FreemarkerServlet.java b/src/main/java/freemarker/ext/servlet/FreemarkerServlet.java
index c0284aa..6ceeeb9 100644
--- a/src/main/java/freemarker/ext/servlet/FreemarkerServlet.java
+++ b/src/main/java/freemarker/ext/servlet/FreemarkerServlet.java
@@ -1633,6 +1633,7 @@
             this.initParamValue = initParamValue;
         }
 
+        @Override
         public String getInitParamValue() {
             return initParamValue;
         }
@@ -1650,6 +1651,7 @@
             this.initParamValue = initParamValue;
         }
 
+        @Override
         public String getInitParamValue() {
             return initParamValue;
         }
@@ -1665,6 +1667,7 @@
             this.initParamValue = initParamValue;
         }
 
+        @Override
         public String getInitParamValue() {
             return initParamValue;
         }
diff --git a/src/main/java/freemarker/ext/servlet/HttpRequestHashModel.java b/src/main/java/freemarker/ext/servlet/HttpRequestHashModel.java
index 2c0d574..0b60283 100644
--- a/src/main/java/freemarker/ext/servlet/HttpRequestHashModel.java
+++ b/src/main/java/freemarker/ext/servlet/HttpRequestHashModel.java
@@ -59,14 +59,17 @@
         this.wrapper = wrapper;
     }
     
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         return wrapper.wrap(request.getAttribute(key));
     }
 
+    @Override
     public boolean isEmpty() {
         return !request.getAttributeNames().hasMoreElements();
     }
     
+    @Override
     public int size() {
         int result = 0;
         for (Enumeration enumeration = request.getAttributeNames(); enumeration.hasMoreElements(); ) {
@@ -76,6 +79,7 @@
         return result;
     }
     
+    @Override
     public TemplateCollectionModel keys() {
         ArrayList keys = new ArrayList();
         for (Enumeration enumeration = request.getAttributeNames(); enumeration.hasMoreElements(); ) {
@@ -84,6 +88,7 @@
         return new SimpleCollection(keys.iterator());
     }
     
+    @Override
     public TemplateCollectionModel values() {
         ArrayList values = new ArrayList();
         for (Enumeration enumeration = request.getAttributeNames(); enumeration.hasMoreElements(); ) {
diff --git a/src/main/java/freemarker/ext/servlet/HttpRequestParametersHashModel.java b/src/main/java/freemarker/ext/servlet/HttpRequestParametersHashModel.java
index 4129aa6..f1d8f41 100644
--- a/src/main/java/freemarker/ext/servlet/HttpRequestParametersHashModel.java
+++ b/src/main/java/freemarker/ext/servlet/HttpRequestParametersHashModel.java
@@ -46,33 +46,41 @@
         this.request = request;
     }
 
+    @Override
     public TemplateModel get(String key) {
         String value = request.getParameter(key);
         return value == null ? null : new SimpleScalar(value);
     }
 
+    @Override
     public boolean isEmpty() {
         return !request.getParameterNames().hasMoreElements();
     }
     
+    @Override
     public int size() {
         return getKeys().size();
     }
     
+    @Override
     public TemplateCollectionModel keys() {
         return new SimpleCollection(getKeys().iterator());
     }
     
+    @Override
     public TemplateCollectionModel values() {
         final Iterator iter = getKeys().iterator();
         return new SimpleCollection(
             new Iterator() {
+                @Override
                 public boolean hasNext() {
                     return iter.hasNext();
                 }
+                @Override
                 public Object next() {
                     return request.getParameter((String) iter.next()); 
                 }
+                @Override
                 public void remove() {
                     throw new UnsupportedOperationException();
                 }
diff --git a/src/main/java/freemarker/ext/servlet/HttpSessionHashModel.java b/src/main/java/freemarker/ext/servlet/HttpSessionHashModel.java
index 0434537..c3bf0fc 100644
--- a/src/main/java/freemarker/ext/servlet/HttpSessionHashModel.java
+++ b/src/main/java/freemarker/ext/servlet/HttpSessionHashModel.java
@@ -77,6 +77,7 @@
         this.response = response;
     }
 
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         checkSessionExistence();
         return wrapper.wrap(session != null ? session.getAttribute(key) : null);
@@ -103,6 +104,7 @@
             (session == null && request == null);
     }
     
+    @Override
     public boolean isEmpty()
     throws TemplateModelException {
         checkSessionExistence();
diff --git a/src/main/java/freemarker/ext/servlet/IncludePage.java b/src/main/java/freemarker/ext/servlet/IncludePage.java
index 9725e00..2f2b5be 100644
--- a/src/main/java/freemarker/ext/servlet/IncludePage.java
+++ b/src/main/java/freemarker/ext/servlet/IncludePage.java
@@ -68,7 +68,8 @@
         this.response = response;
     }
     
-    public void execute(final Environment env, Map params, 
+    @Override
+    public void execute(final Environment env, Map params,
             TemplateModel[] loopVars, TemplateDirectiveBody body)
     throws TemplateException, IOException {
         // Determine the path
diff --git a/src/main/java/freemarker/ext/servlet/ServletContextHashModel.java b/src/main/java/freemarker/ext/servlet/ServletContextHashModel.java
index e917ccf..88c7253 100644
--- a/src/main/java/freemarker/ext/servlet/ServletContextHashModel.java
+++ b/src/main/java/freemarker/ext/servlet/ServletContextHashModel.java
@@ -54,10 +54,12 @@
         this.wrapper = wrapper;
     }
 
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         return wrapper.wrap(servletctx.getAttribute(key));
     }
 
+    @Override
     public boolean isEmpty() {
         return !servletctx.getAttributeNames().hasMoreElements();
     }
diff --git a/src/main/java/freemarker/ext/util/IdentityHashMap.java b/src/main/java/freemarker/ext/util/IdentityHashMap.java
index 68b14ba..038d5ad 100644
--- a/src/main/java/freemarker/ext/util/IdentityHashMap.java
+++ b/src/main/java/freemarker/ext/util/IdentityHashMap.java
@@ -626,14 +626,17 @@
 
         // Map.Entry Ops
 
+        @Override
         public Object getKey() {
             return key;
         }
 
+        @Override
         public Object getValue() {
             return value;
         }
 
+        @Override
         public Object setValue(Object value) {
             Object oldValue = this.value;
             this.value = value;
@@ -677,14 +680,17 @@
 
         }
 
+        @Override
         public boolean hasNext() {
             return false;
         }
 
+        @Override
         public Object next() {
             throw new NoSuchElementException();
         }
 
+        @Override
         public void remove() {
             throw new IllegalStateException();
         }
@@ -709,6 +715,7 @@
             this.type = type;
         }
 
+        @Override
         public boolean hasNext() {
             Entry e = entry;
             int i = index;
@@ -721,6 +728,7 @@
             return e != null;
         }
 
+        @Override
         public Object next() {
             if (modCount != expectedModCount)
                 throw new ConcurrentModificationException();
@@ -743,6 +751,7 @@
             throw new NoSuchElementException();
         }
 
+        @Override
         public void remove() {
             if (lastReturned == null)
                 throw new IllegalStateException();
diff --git a/src/main/java/freemarker/ext/xml/Namespaces.java b/src/main/java/freemarker/ext/xml/Namespaces.java
index 730b79a..5a09b9a 100644
--- a/src/main/java/freemarker/ext/xml/Namespaces.java
+++ b/src/main/java/freemarker/ext/xml/Namespaces.java
@@ -59,6 +59,7 @@
         }   
     }
     
+    @Override
     public Object exec(List arguments) throws TemplateModelException {
         if (arguments.size() != 2) {
             throw new TemplateModelException("_registerNamespace(prefix, uri) requires two arguments");
diff --git a/src/main/java/freemarker/ext/xml/Navigator.java b/src/main/java/freemarker/ext/xml/Navigator.java
index 1065868..fc1ca2b 100644
--- a/src/main/java/freemarker/ext/xml/Navigator.java
+++ b/src/main/java/freemarker/ext/xml/Navigator.java
@@ -153,18 +153,21 @@
     }
 
     private class ChildrenOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             getChildren(node, localName, namespaceUri, result);
         }
     }
 
     private class AttributesOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             getAttributes(node, localName, namespaceUri, result);
         }
     }
 
     private class DescendantOrSelfOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             result.add(node);
             getDescendants(node, result);
@@ -172,12 +175,14 @@
     }
 
     private class DescendantOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             getDescendants(node, result);
         }
     }
 
     private class AncestorOrSelfOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             result.add(node);
             getAncestors(node, result);
@@ -185,12 +190,14 @@
     }
 
     private class AncestorOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             getAncestors(node, result);
         }
     }
 
     private class ParentOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             Object parent = getParent(node);
             if (parent != null) {
@@ -200,6 +207,7 @@
     }
 
     private class DocumentOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             Object document = getDocument(node);
             if (document != null) {
@@ -209,6 +217,7 @@
     }
 
     private class DocumentTypeOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             Object documentType = getDocumentType(node);
             if (documentType != null) {
@@ -218,12 +227,14 @@
     }
 
     private class ContentOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             getContent(node, result);
         }
     }
 
     private class TextOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             String text = getText(node);
             if (text != null) {
@@ -233,6 +244,7 @@
     }
 
     private class LocalNameOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             String text = getLocalName(node);
             if (text != null) {
@@ -242,6 +254,7 @@
     }
 
     private class QualifiedNameOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             String qname = getQualifiedName(node);
             if (qname != null) {
@@ -251,6 +264,7 @@
     }
 
     private class NamespacePrefixOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             String text = getNamespacePrefix(node);
             if (text != null) {
@@ -260,6 +274,7 @@
     }
 
     private class NamespaceUriOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             String text = getNamespaceUri(node);
             if (text != null) {
@@ -269,6 +284,7 @@
     }
 
     private class TypeOp implements NodeOperator {
+        @Override
         public void process(Object node, String localName, String namespaceUri, List result) {
             result.add(getType(node));
         }
diff --git a/src/main/java/freemarker/ext/xml/NodeListModel.java b/src/main/java/freemarker/ext/xml/NodeListModel.java
index af4e055..2f96767 100644
--- a/src/main/java/freemarker/ext/xml/NodeListModel.java
+++ b/src/main/java/freemarker/ext/xml/NodeListModel.java
@@ -148,6 +148,7 @@
      * Returns the number of nodes in this model's nodelist.
      * @see freemarker.template.TemplateSequenceModel#size()
      */
+    @Override
     public int size() {
         return nodes.size();
     }
@@ -160,6 +161,7 @@
      * expression to this model's nodelist.
      * @see freemarker.template.TemplateMethodModel#exec(List)
      */
+    @Override
     public Object exec(List arguments) throws TemplateModelException {
         if (arguments.size() != 1) {
             throw new TemplateModelException(
@@ -179,6 +181,7 @@
      * XML"). 
      * @see freemarker.template.TemplateScalarModel#getAsString()
      */
+    @Override
     public String getAsString() throws TemplateModelException {
         StringWriter sw = new StringWriter(size() * 128);
         for (Iterator iter = nodes.iterator(); iter.hasNext(); ) {
@@ -198,6 +201,7 @@
      * @param index the ordinal number of the selected node 
      * @see freemarker.template.TemplateSequenceModel#get(int)
      */
+    @Override
     public TemplateModel get(int index) {
         return deriveModel(Collections.singletonList(nodes.get(index)));
     }
@@ -380,6 +384,7 @@
      * the operator to this model's nodes.
      * @see freemarker.template.TemplateHashModel#get(String)
      */
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         // Try a built-in navigator operator
         NodeOperator op = navigator.getOperator(key);
@@ -434,6 +439,7 @@
      * Returns true if this NodeListModel contains no nodes. 
      * @see freemarker.template.TemplateHashModel#isEmpty()
      */
+    @Override
     public boolean isEmpty() {
         return nodes.isEmpty();
     }
@@ -454,6 +460,7 @@
     private class FilterByType
     implements
         TemplateMethodModel {
+        @Override
         public Object exec(List arguments) {
             List filteredNodes = new ArrayList();
             for (Iterator iter = arguments.iterator(); iter.hasNext(); ) {
@@ -503,21 +510,26 @@
         }
     }
 
+    @Override
     public TemplateSequenceModel getChildNodes() throws TemplateModelException {
         return (TemplateSequenceModel) get("_content");
     }
 
+    @Override
     public String getNodeName() throws TemplateModelException {
         return getUniqueText((NodeListModel) get("_name"), "name");
     }
 
+    @Override
     public String getNodeNamespace() throws TemplateModelException {
         return getUniqueText((NodeListModel) get("_nsuri"), "namespace");
     }
 
+    @Override
     public String getNodeType() throws TemplateModelException {
         return getUniqueText((NodeListModel) get("_type"), "type");
     }
+    @Override
     public TemplateNodeModel getParentNode() throws TemplateModelException {
         return (TemplateNodeModel) get("_parent"); 
     }
diff --git a/src/main/java/freemarker/ext/xml/_Dom4jNavigator.java b/src/main/java/freemarker/ext/xml/_Dom4jNavigator.java
index 23b631d..28bc2fc 100644
--- a/src/main/java/freemarker/ext/xml/_Dom4jNavigator.java
+++ b/src/main/java/freemarker/ext/xml/_Dom4jNavigator.java
@@ -232,6 +232,7 @@
             super(path);
         }
 
+        @Override
         public List selectNodes(Object object, NamespaceContext namespaces)
         throws TemplateModelException {
             Context context = getContext(object);
diff --git a/src/main/java/freemarker/ext/xml/_DomNavigator.java b/src/main/java/freemarker/ext/xml/_DomNavigator.java
index a8fa538..e41053a 100644
--- a/src/main/java/freemarker/ext/xml/_DomNavigator.java
+++ b/src/main/java/freemarker/ext/xml/_DomNavigator.java
@@ -317,6 +317,7 @@
             super(path);
         }
 
+        @Override
         public List selectNodes(Object object, NamespaceContext namespaces)
         throws TemplateModelException {
             Context context = getContext(object);
diff --git a/src/main/java/freemarker/ext/xml/_JdomNavigator.java b/src/main/java/freemarker/ext/xml/_JdomNavigator.java
index 6ff4440..edbc0a1 100644
--- a/src/main/java/freemarker/ext/xml/_JdomNavigator.java
+++ b/src/main/java/freemarker/ext/xml/_JdomNavigator.java
@@ -332,6 +332,7 @@
             super(path);
         }
 
+        @Override
         public List selectNodes(Object object, NamespaceContext namespaces)
         throws TemplateModelException {
             Context context = getContext(object);
diff --git a/src/main/java/freemarker/log/CommonsLoggingLoggerFactory.java b/src/main/java/freemarker/log/CommonsLoggingLoggerFactory.java
index de64490..28c88d9 100644
--- a/src/main/java/freemarker/log/CommonsLoggingLoggerFactory.java
+++ b/src/main/java/freemarker/log/CommonsLoggingLoggerFactory.java
@@ -26,6 +26,7 @@
 @Deprecated
 public class CommonsLoggingLoggerFactory implements LoggerFactory {
 
+    @Override
     public Logger getLogger(String category) {
             return new CommonsLoggingLogger(
                             org.apache.commons.logging.LogFactory.getLog(category));
diff --git a/src/main/java/freemarker/log/Logger.java b/src/main/java/freemarker/log/Logger.java
index c60310e..be7f965 100644
--- a/src/main/java/freemarker/log/Logger.java
+++ b/src/main/java/freemarker/log/Logger.java
@@ -551,6 +551,7 @@
         try {
             return (String) AccessController.doPrivileged(
                     new PrivilegedAction() {
+                        @Override
                         public Object run() {
                             return System.getProperty(key, null);
                         }
diff --git a/src/main/java/freemarker/log/SLF4JLoggerFactory.java b/src/main/java/freemarker/log/SLF4JLoggerFactory.java
index f98a1b5..f18b054 100644
--- a/src/main/java/freemarker/log/SLF4JLoggerFactory.java
+++ b/src/main/java/freemarker/log/SLF4JLoggerFactory.java
@@ -28,6 +28,7 @@
 @Deprecated
 public class SLF4JLoggerFactory implements LoggerFactory {
 
+    @Override
     public Logger getLogger(String category) {
             org.slf4j.Logger slf4jLogger = org.slf4j.LoggerFactory.getLogger(category);
             if (slf4jLogger instanceof LocationAwareLogger) {
diff --git a/src/main/java/freemarker/log/_AvalonLoggerFactory.java b/src/main/java/freemarker/log/_AvalonLoggerFactory.java
index 9b5e50c..8058a73 100644
--- a/src/main/java/freemarker/log/_AvalonLoggerFactory.java
+++ b/src/main/java/freemarker/log/_AvalonLoggerFactory.java
@@ -26,6 +26,7 @@
  * compliance issues. FreeMarker developers only: treat this class as package-visible.
  */
 public class _AvalonLoggerFactory implements LoggerFactory {
+    @Override
     public Logger getLogger(String category) {
         return new AvalonLogger(Hierarchy.getDefaultHierarchy().getLoggerFor(category));
     }
diff --git a/src/main/java/freemarker/log/_JULLoggerFactory.java b/src/main/java/freemarker/log/_JULLoggerFactory.java
index 475db7f..e596879 100644
--- a/src/main/java/freemarker/log/_JULLoggerFactory.java
+++ b/src/main/java/freemarker/log/_JULLoggerFactory.java
@@ -26,6 +26,7 @@
  * compliance issues. FreeMarker developers only: treat this class as package-visible.
  */
 public class _JULLoggerFactory implements LoggerFactory {
+    @Override
     public Logger getLogger(String category) {
         return new JULLogger(java.util.logging.Logger.getLogger(category));
     }
diff --git a/src/main/java/freemarker/log/_Log4jLoggerFactory.java b/src/main/java/freemarker/log/_Log4jLoggerFactory.java
index 9547bbd..2391a2e 100644
--- a/src/main/java/freemarker/log/_Log4jLoggerFactory.java
+++ b/src/main/java/freemarker/log/_Log4jLoggerFactory.java
@@ -26,6 +26,7 @@
  * compliance issues. FreeMarker developers only: treat this class as package-visible.
  */
 public class _Log4jLoggerFactory implements LoggerFactory {
+    @Override
     public Logger getLogger(String category) {
         return new Log4jLogger(org.apache.log4j.Logger.getLogger(category));
     }
diff --git a/src/main/java/freemarker/log/_NullLoggerFactory.java b/src/main/java/freemarker/log/_NullLoggerFactory.java
index 85cff74..d34d7c3 100644
--- a/src/main/java/freemarker/log/_NullLoggerFactory.java
+++ b/src/main/java/freemarker/log/_NullLoggerFactory.java
@@ -27,6 +27,7 @@
     _NullLoggerFactory() {
     }
     
+    @Override
     public Logger getLogger(String category) {
         return INSTANCE;
     }
diff --git a/src/main/java/freemarker/template/Configuration.java b/src/main/java/freemarker/template/Configuration.java
index f6b6368..db736df 100644
--- a/src/main/java/freemarker/template/Configuration.java
+++ b/src/main/java/freemarker/template/Configuration.java
@@ -1919,6 +1919,7 @@
     /**
      * The getter pair of {@link #setStrictSyntaxMode}.
      */
+    @Override
     public boolean getStrictSyntaxMode() {
         return strictSyntax;
     }
@@ -2002,6 +2003,7 @@
      * @return Never {@code null}. 
      * @since 2.3.20
      */
+    @Override
     public Version getIncompatibleImprovements() {
         return incompatibleImprovements;
     }
@@ -2045,6 +2047,7 @@
      *
      * @see #setWhitespaceStripping
      */
+    @Override
     public boolean getWhitespaceStripping() {
         return whitespaceStripping;
     }
@@ -2113,6 +2116,7 @@
      * 
      * @since 2.3.24
      */
+    @Override
     public int getAutoEscapingPolicy() {
         return autoEscapingPolicy;
     }
@@ -2161,6 +2165,7 @@
      * 
      * @since 2.3.24
      */
+    @Override
     public OutputFormat getOutputFormat() {
         return outputFormat;
     }
@@ -2413,6 +2418,7 @@
      * 
      * @since 2.3.24
      */
+    @Override
     public boolean getRecognizeStandardFileExtensions() {
         return recognizeStandardFileExtensions == null
                 ? incompatibleImprovements.intValue() >= _TemplateAPI.VERSION_INT_2_3_24
@@ -2456,6 +2462,7 @@
     /**
      * The getter pair of {@link #setTagSyntax(int)}.
      */
+    @Override
     public int getTagSyntax() {
         return tagSyntax;
     }
@@ -2484,6 +2491,7 @@
      * 
      * @since 2.3.28
      */
+    @Override
     public int getInterpolationSyntax() {
         return interpolationSyntax;
     }
@@ -2549,6 +2557,7 @@
      * 
      * @since 2.3.23
      */
+    @Override
     public int getNamingConvention() {
         return namingConvention;
     }
@@ -2583,6 +2592,7 @@
      * 
      * @since 2.3.25
      */
+    @Override
     public int getTabSize() {
         return tabSize;
     }
diff --git a/src/main/java/freemarker/template/DefaultArrayAdapter.java b/src/main/java/freemarker/template/DefaultArrayAdapter.java
index 645e7ea..6fa7ac0 100644
--- a/src/main/java/freemarker/template/DefaultArrayAdapter.java
+++ b/src/main/java/freemarker/template/DefaultArrayAdapter.java
@@ -97,6 +97,7 @@
         super(wrapper);
     }
 
+    @Override
     public final Object getAdaptedObject(Class hint) {
         return getWrappedObject();
     }
@@ -110,14 +111,17 @@
             this.array = array;
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return index >= 0 && index < array.length ? wrap(array[index]) : null;
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return array.length;
         }
 
+        @Override
         public Object getWrappedObject() {
             return array;
         }
@@ -133,14 +137,17 @@
             this.array = array;
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return index >= 0 && index < array.length ? wrap(Byte.valueOf(array[index])) : null;
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return array.length;
         }
 
+        @Override
         public Object getWrappedObject() {
             return array;
         }
@@ -156,14 +163,17 @@
             this.array = array;
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return index >= 0 && index < array.length ? wrap(Short.valueOf(array[index])) : null;
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return array.length;
         }
 
+        @Override
         public Object getWrappedObject() {
             return array;
         }
@@ -179,14 +189,17 @@
             this.array = array;
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return index >= 0 && index < array.length ? wrap(Integer.valueOf(array[index])) : null;
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return array.length;
         }
 
+        @Override
         public Object getWrappedObject() {
             return array;
         }
@@ -202,14 +215,17 @@
             this.array = array;
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return index >= 0 && index < array.length ? wrap(Long.valueOf(array[index])) : null;
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return array.length;
         }
 
+        @Override
         public Object getWrappedObject() {
             return array;
         }
@@ -225,14 +241,17 @@
             this.array = array;
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return index >= 0 && index < array.length ? wrap(Float.valueOf(array[index])) : null;
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return array.length;
         }
 
+        @Override
         public Object getWrappedObject() {
             return array;
         }
@@ -248,14 +267,17 @@
             this.array = array;
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return index >= 0 && index < array.length ? wrap(Double.valueOf(array[index])) : null;
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return array.length;
         }
 
+        @Override
         public Object getWrappedObject() {
             return array;
         }
@@ -271,14 +293,17 @@
             this.array = array;
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return index >= 0 && index < array.length ? wrap(Character.valueOf(array[index])) : null;
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return array.length;
         }
 
+        @Override
         public Object getWrappedObject() {
             return array;
         }
@@ -294,14 +319,17 @@
             this.array = array;
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return index >= 0 && index < array.length ? wrap(Boolean.valueOf(array[index])) : null;
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return array.length;
         }
 
+        @Override
         public Object getWrappedObject() {
             return array;
         }
@@ -322,14 +350,17 @@
             length = Array.getLength(array);
         }
 
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return index >= 0 && index < length ? wrap(Array.get(array, index)) : null;
         }
 
+        @Override
         public int size() throws TemplateModelException {
             return length;
         }
 
+        @Override
         public Object getWrappedObject() {
             return array;
         }
diff --git a/src/main/java/freemarker/template/DefaultEnumerationAdapter.java b/src/main/java/freemarker/template/DefaultEnumerationAdapter.java
index 6a26fc1..fdd0bea 100644
--- a/src/main/java/freemarker/template/DefaultEnumerationAdapter.java
+++ b/src/main/java/freemarker/template/DefaultEnumerationAdapter.java
@@ -56,18 +56,22 @@
         this.enumeration = enumeration;
     }
 
+    @Override
     public Object getWrappedObject() {
         return enumeration;
     }
 
+    @Override
     public Object getAdaptedObject(Class<?> hint) {
         return getWrappedObject();
     }
 
+    @Override
     public TemplateModelIterator iterator() throws TemplateModelException {
         return new SimpleTemplateModelIterator();
     }
 
+    @Override
     public TemplateModel getAPI() throws TemplateModelException {
         return ((ObjectWrapperWithAPISupport) getObjectWrapper()).wrapAsAPI(enumeration);
     }
@@ -79,6 +83,7 @@
 
         private boolean enumerationOwnedByMe;
 
+        @Override
         public TemplateModel next() throws TemplateModelException {
             if (!enumerationOwnedByMe) {
                 checkNotOwner();
@@ -94,6 +99,7 @@
             return value instanceof TemplateModel ? (TemplateModel) value : wrap(value);
         }
 
+        @Override
         public boolean hasNext() throws TemplateModelException {
             // Calling hasNext may looks safe, but I have met sync. problems.
             if (!enumerationOwnedByMe) {
diff --git a/src/main/java/freemarker/template/DefaultIterableAdapter.java b/src/main/java/freemarker/template/DefaultIterableAdapter.java
index 7438ff9..24a07ea 100644
--- a/src/main/java/freemarker/template/DefaultIterableAdapter.java
+++ b/src/main/java/freemarker/template/DefaultIterableAdapter.java
@@ -67,18 +67,22 @@
         this.iterable = iterable;
     }
 
+    @Override
     public TemplateModelIterator iterator() throws TemplateModelException {
         return new IteratorToTemplateModelIteratorAdapter(iterable.iterator(), getObjectWrapper());
     }
 
+    @Override
     public Object getWrappedObject() {
         return iterable;
     }
 
+    @Override
     public Object getAdaptedObject(Class hint) {
         return getWrappedObject();
     }
 
+    @Override
     public TemplateModel getAPI() throws TemplateModelException {
         return ((ObjectWrapperWithAPISupport) getObjectWrapper()).wrapAsAPI(iterable);
     }
diff --git a/src/main/java/freemarker/template/DefaultIteratorAdapter.java b/src/main/java/freemarker/template/DefaultIteratorAdapter.java
index 150e51f..8f8d0c3 100644
--- a/src/main/java/freemarker/template/DefaultIteratorAdapter.java
+++ b/src/main/java/freemarker/template/DefaultIteratorAdapter.java
@@ -65,18 +65,22 @@
         this.iterator = iterator;
     }
 
+    @Override
     public Object getWrappedObject() {
         return iterator;
     }
 
+    @Override
     public Object getAdaptedObject(Class hint) {
         return getWrappedObject();
     }
 
+    @Override
     public TemplateModelIterator iterator() throws TemplateModelException {
         return new SimpleTemplateModelIterator();
     }
 
+    @Override
     public TemplateModel getAPI() throws TemplateModelException {
         return ((ObjectWrapperWithAPISupport) getObjectWrapper()).wrapAsAPI(iterator);
     }
@@ -88,6 +92,7 @@
 
         private boolean iteratorOwnedByMe;
 
+        @Override
         public TemplateModel next() throws TemplateModelException {
             if (!iteratorOwnedByMe) {
                 checkNotOwner();
@@ -103,6 +108,7 @@
             return value instanceof TemplateModel ? (TemplateModel) value : wrap(value);
         }
 
+        @Override
         public boolean hasNext() throws TemplateModelException {
             // Calling hasNext may looks safe, but I have met sync. problems.
             if (!iteratorOwnedByMe) {
diff --git a/src/main/java/freemarker/template/DefaultListAdapter.java b/src/main/java/freemarker/template/DefaultListAdapter.java
index 3585ed8..1f84c30 100644
--- a/src/main/java/freemarker/template/DefaultListAdapter.java
+++ b/src/main/java/freemarker/template/DefaultListAdapter.java
@@ -72,18 +72,22 @@
         this.list = list;
     }
 
+    @Override
     public TemplateModel get(int index) throws TemplateModelException {
         return index >= 0 && index < list.size() ? wrap(list.get(index)) : null;
     }
 
+    @Override
     public int size() throws TemplateModelException {
         return list.size();
     }
 
+    @Override
     public Object getAdaptedObject(Class hint) {
         return getWrappedObject();
     }
 
+    @Override
     public Object getWrappedObject() {
         return list;
     }
@@ -95,12 +99,14 @@
             super(list, wrapper);
         }
 
+        @Override
         public TemplateModelIterator iterator() throws TemplateModelException {
             return new IteratorToTemplateModelIteratorAdapter(list.iterator(), getObjectWrapper());
         }
 
     }
 
+    @Override
     public TemplateModel getAPI() throws TemplateModelException {
         return ((ObjectWrapperWithAPISupport) getObjectWrapper()).wrapAsAPI(list);
     }
diff --git a/src/main/java/freemarker/template/DefaultMapAdapter.java b/src/main/java/freemarker/template/DefaultMapAdapter.java
index 3039e4c..a892aae 100644
--- a/src/main/java/freemarker/template/DefaultMapAdapter.java
+++ b/src/main/java/freemarker/template/DefaultMapAdapter.java
@@ -67,6 +67,7 @@
         this.map = map;
     }
 
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         Object val;
         try {
@@ -118,34 +119,42 @@
         return wrap(val);
     }
 
+    @Override
     public boolean isEmpty() {
         return map.isEmpty();
     }
 
+    @Override
     public int size() {
         return map.size();
     }
 
+    @Override
     public TemplateCollectionModel keys() {
         return new SimpleCollection(map.keySet(), getObjectWrapper());
     }
 
+    @Override
     public TemplateCollectionModel values() {
         return new SimpleCollection(map.values(), getObjectWrapper());
     }
 
+    @Override
     public KeyValuePairIterator keyValuePairIterator() {
         return new MapKeyValuePairIterator(map, getObjectWrapper());
     }
 
+    @Override
     public Object getAdaptedObject(Class hint) {
         return map;
     }
 
+    @Override
     public Object getWrappedObject() {
         return map;
     }
 
+    @Override
     public TemplateModel getAPI() throws TemplateModelException {
         return ((ObjectWrapperWithAPISupport) getObjectWrapper()).wrapAsAPI(map);
     }
diff --git a/src/main/java/freemarker/template/DefaultNonListCollectionAdapter.java b/src/main/java/freemarker/template/DefaultNonListCollectionAdapter.java
index 11241e1..2da89a4 100644
--- a/src/main/java/freemarker/template/DefaultNonListCollectionAdapter.java
+++ b/src/main/java/freemarker/template/DefaultNonListCollectionAdapter.java
@@ -69,22 +69,27 @@
         this.collection = collection;
     }
 
+    @Override
     public TemplateModelIterator iterator() throws TemplateModelException {
         return new IteratorToTemplateModelIteratorAdapter(collection.iterator(), getObjectWrapper());
     }
 
+    @Override
     public int size() {
         return collection.size();
     }
 
+    @Override
     public boolean isEmpty() {
         return collection.isEmpty();
     }
 
+    @Override
     public Object getWrappedObject() {
         return collection;
     }
 
+    @Override
     public Object getAdaptedObject(Class hint) {
         return getWrappedObject();
     }
@@ -101,6 +106,7 @@
         }
     }
 
+    @Override
     public TemplateModel getAPI() throws TemplateModelException {
         return ((ObjectWrapperWithAPISupport) getObjectWrapper()).wrapAsAPI(collection);
     }
diff --git a/src/main/java/freemarker/template/DefaultObjectWrapperBuilder.java b/src/main/java/freemarker/template/DefaultObjectWrapperBuilder.java
index 1890ba9..dc925db 100644
--- a/src/main/java/freemarker/template/DefaultObjectWrapperBuilder.java
+++ b/src/main/java/freemarker/template/DefaultObjectWrapperBuilder.java
@@ -73,6 +73,7 @@
     
         private static final DefaultObjectWrapperFactory INSTANCE = new DefaultObjectWrapperFactory(); 
         
+        @Override
         public DefaultObjectWrapper create(DefaultObjectWrapperConfiguration bwConf) {
             return new DefaultObjectWrapper(bwConf, true);
         }
diff --git a/src/main/java/freemarker/template/EmptyMap.java b/src/main/java/freemarker/template/EmptyMap.java
index 763ac93..354a541 100644
--- a/src/main/java/freemarker/template/EmptyMap.java
+++ b/src/main/java/freemarker/template/EmptyMap.java
@@ -35,38 +35,47 @@
 public class EmptyMap implements Map, Cloneable {
     public static final EmptyMap instance = new EmptyMap(); 
     
+    @Override
     public void clear() {
         // no op
     }
     
+    @Override
     public boolean containsKey(Object arg0) {
         return false;
     }
     
+    @Override
     public boolean containsValue(Object arg0) {
         return false;
     }
     
+    @Override
     public Set entrySet() {
         return Collections.EMPTY_SET;
     }
     
+    @Override
     public Object get(Object arg0) {
         return null;
     }
     
+    @Override
     public boolean isEmpty() {
         return true;
     }
     
+    @Override
     public Set keySet() {
         return Collections.EMPTY_SET;
     }
     
+    @Override
     public Object put(Object arg0, Object arg1) {
         throw new UnsupportedOperationException("This Map is read-only.");
     }
     
+    @Override
     public void putAll(Map arg0) {
         // Checking for arg0.isEmpty() wouldn't reflect precisely how putAll in
         // AbstractMap works. 
@@ -75,14 +84,17 @@
         }
     }
     
+    @Override
     public Object remove(Object arg0) {
         return null;
     }
     
+    @Override
     public int size() {
         return 0;
     }
     
+    @Override
     public Collection values() {
         return Collections.EMPTY_LIST;
     }
diff --git a/src/main/java/freemarker/template/FalseTemplateBooleanModel.java b/src/main/java/freemarker/template/FalseTemplateBooleanModel.java
index 02628c8..7bbcc49 100644
--- a/src/main/java/freemarker/template/FalseTemplateBooleanModel.java
+++ b/src/main/java/freemarker/template/FalseTemplateBooleanModel.java
@@ -24,6 +24,7 @@
  */
 final class FalseTemplateBooleanModel implements SerializableTemplateBooleanModel {
     
+    @Override
     public boolean getAsBoolean() {
         return false;
     }
diff --git a/src/main/java/freemarker/template/GeneralPurposeNothing.java b/src/main/java/freemarker/template/GeneralPurposeNothing.java
index cb2d3af..67dbfe9 100644
--- a/src/main/java/freemarker/template/GeneralPurposeNothing.java
+++ b/src/main/java/freemarker/template/GeneralPurposeNothing.java
@@ -41,42 +41,52 @@
         return instance;
     }
 
+    @Override
     public String getAsString() {
         return "";
     }
 
+    @Override
     public boolean getAsBoolean() {
         return false;
     }
 
+    @Override
     public boolean isEmpty() {
         return true;
     }
 
+    @Override
     public int size() {
         return 0;
     }
 
+    @Override
     public TemplateModel get(int i) throws TemplateModelException {
         throw new TemplateModelException("Can't get item from an empty sequence.");
     }
 
+    @Override
     public TemplateModel get(String key) {
         return null;
     }
 
+    @Override
     public Object exec(List args) {
         return null;
     }
     
+    @Override
     public TemplateCollectionModel keys() {
         return Constants.EMPTY_COLLECTION;
     }
 
+    @Override
     public TemplateCollectionModel values() {
         return Constants.EMPTY_COLLECTION;
     }
 
+    @Override
     public KeyValuePairIterator keyValuePairIterator() throws TemplateModelException {
         return Constants.EMPTY_KEY_VALUE_PAIR_ITERATOR;
     }
diff --git a/src/main/java/freemarker/template/IteratorToTemplateModelIteratorAdapter.java b/src/main/java/freemarker/template/IteratorToTemplateModelIteratorAdapter.java
index 6b49237..594cd65 100644
--- a/src/main/java/freemarker/template/IteratorToTemplateModelIteratorAdapter.java
+++ b/src/main/java/freemarker/template/IteratorToTemplateModelIteratorAdapter.java
@@ -35,6 +35,7 @@
         this.wrapper = wrapper;
     }
 
+    @Override
     public TemplateModel next() throws TemplateModelException {
         try {
             return wrapper.wrap(it.next());
@@ -43,6 +44,7 @@
         }
     }
 
+    @Override
     public boolean hasNext() throws TemplateModelException {
         return it.hasNext();
     }
diff --git a/src/main/java/freemarker/template/LocalizedString.java b/src/main/java/freemarker/template/LocalizedString.java
index f65267c..943c7de 100755
--- a/src/main/java/freemarker/template/LocalizedString.java
+++ b/src/main/java/freemarker/template/LocalizedString.java
@@ -44,7 +44,8 @@
 abstract public class LocalizedString implements TemplateScalarModel {
 	
 	
-	public String getAsString() throws TemplateModelException {
+	@Override
+    public String getAsString() throws TemplateModelException {
 		Environment env = Environment.getCurrentEnvironment();
 		Locale locale = env.getLocale();
 		return getLocalizedString(locale);
diff --git a/src/main/java/freemarker/template/LoggingAttemptExceptionReporter.java b/src/main/java/freemarker/template/LoggingAttemptExceptionReporter.java
index 19c3893..09e54f6 100644
--- a/src/main/java/freemarker/template/LoggingAttemptExceptionReporter.java
+++ b/src/main/java/freemarker/template/LoggingAttemptExceptionReporter.java
@@ -35,6 +35,7 @@
         this.logAsWarn = logAsWarn;
     }
 
+    @Override
     public void report(TemplateException te, Environment env) {
         String message = "Error executing FreeMarker template part in the #attempt block";
         if (!logAsWarn) {
diff --git a/src/main/java/freemarker/template/MapKeyValuePairIterator.java b/src/main/java/freemarker/template/MapKeyValuePairIterator.java
index 05e1356..3cc0171 100644
--- a/src/main/java/freemarker/template/MapKeyValuePairIterator.java
+++ b/src/main/java/freemarker/template/MapKeyValuePairIterator.java
@@ -43,18 +43,22 @@
         this.objectWrapper = objectWrapper;
     }
 
+    @Override
     public boolean hasNext() {
         return entrySetIterator.hasNext();
     }
 
+    @Override
     public KeyValuePair next() {
         final Entry<?, ?> entry = entrySetIterator.next();
         return new KeyValuePair() {
 
+            @Override
             public TemplateModel getKey() throws TemplateModelException {
                 return wrap(entry.getKey());
             }
 
+            @Override
             public TemplateModel getValue() throws TemplateModelException {
                 return wrap(entry.getValue());
             }
diff --git a/src/main/java/freemarker/template/SimpleCollection.java b/src/main/java/freemarker/template/SimpleCollection.java
index 46e8671..ec19581 100644
--- a/src/main/java/freemarker/template/SimpleCollection.java
+++ b/src/main/java/freemarker/template/SimpleCollection.java
@@ -104,6 +104,7 @@
      * <tt>TemplateModelException</tt> when you try to call their methods, since the wrapped <tt>Iterator</tt>
      * can't return the first element anymore.
      */
+    @Override
     public TemplateModelIterator iterator() {
         return iterator != null
                 ? new SimpleTemplateModelIterator(iterator, false)
@@ -126,6 +127,7 @@
             this.iteratorOwnedByMe = iteratorOwnedByMe;
         }
 
+        @Override
         public TemplateModel next() throws TemplateModelException {
             if (!iteratorOwnedByMe) { 
                 synchronized (SimpleCollection.this) {
@@ -143,6 +145,7 @@
             return value instanceof TemplateModel ? (TemplateModel) value : wrap(value);
         }
 
+        @Override
         public boolean hasNext() throws TemplateModelException {
             // Calling hasNext may looks safe, but I have met sync. problems.
             if (!iteratorOwnedByMe) {
diff --git a/src/main/java/freemarker/template/SimpleDate.java b/src/main/java/freemarker/template/SimpleDate.java
index c8b9963..b92b335 100644
--- a/src/main/java/freemarker/template/SimpleDate.java
+++ b/src/main/java/freemarker/template/SimpleDate.java
@@ -64,10 +64,12 @@
         this.type = type;
     }
     
+    @Override
     public java.util.Date getAsDate() {
         return date;
     }
 
+    @Override
     public int getDateType() {
         return type;
     }
diff --git a/src/main/java/freemarker/template/SimpleHash.java b/src/main/java/freemarker/template/SimpleHash.java
index f32ebb2..ff5510e 100644
--- a/src/main/java/freemarker/template/SimpleHash.java
+++ b/src/main/java/freemarker/template/SimpleHash.java
@@ -209,6 +209,7 @@
         put(key, b ? TemplateBooleanModel.TRUE : TemplateBooleanModel.FALSE);
     }
 
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         Object result;
         try {
@@ -345,22 +346,27 @@
         return map.toString();
     }
 
+    @Override
     public int size() {
         return map.size();
     }
 
+    @Override
     public boolean isEmpty() {
         return map == null || map.isEmpty();
     }
 
+    @Override
     public TemplateCollectionModel keys() {
         return new SimpleCollection(map.keySet(), getObjectWrapper());
     }
 
+    @Override
     public TemplateCollectionModel values() {
         return new SimpleCollection(map.values(), getObjectWrapper());
     }
 
+    @Override
     public KeyValuePairIterator keyValuePairIterator() {
         return new MapKeyValuePairIterator(map, getObjectWrapper());
     }
diff --git a/src/main/java/freemarker/template/SimpleNumber.java b/src/main/java/freemarker/template/SimpleNumber.java
index 860b68c..5de9cc7 100644
--- a/src/main/java/freemarker/template/SimpleNumber.java
+++ b/src/main/java/freemarker/template/SimpleNumber.java
@@ -63,6 +63,7 @@
         this.value = Double.valueOf(val);
     }
 
+    @Override
     public Number getAsNumber() {
         return value;
     }
diff --git a/src/main/java/freemarker/template/SimpleScalar.java b/src/main/java/freemarker/template/SimpleScalar.java
index ea44017..a5f31ad 100644
--- a/src/main/java/freemarker/template/SimpleScalar.java
+++ b/src/main/java/freemarker/template/SimpleScalar.java
@@ -48,6 +48,7 @@
         this.value = value;
     }
 
+    @Override
     public String getAsString() {
         return (value == null) ? "" : value;
     }
diff --git a/src/main/java/freemarker/template/SimpleSequence.java b/src/main/java/freemarker/template/SimpleSequence.java
index cf5560f..a6b5aea 100644
--- a/src/main/java/freemarker/template/SimpleSequence.java
+++ b/src/main/java/freemarker/template/SimpleSequence.java
@@ -233,6 +233,7 @@
      * Returns the item at the specified index of the list. If the item isn't yet an {@link TemplateModel}, it will wrap
      * it to one now, and writes it back into the backing list.
      */
+    @Override
     public TemplateModel get(int index) throws TemplateModelException {
         try {
             Object value = list.get(index);
@@ -247,6 +248,7 @@
         }
     }
 
+    @Override
     public int size() {
         return list.size();
     }
diff --git a/src/main/java/freemarker/template/TemplateException.java b/src/main/java/freemarker/template/TemplateException.java
index 7290a16..f0781b1 100644
--- a/src/main/java/freemarker/template/TemplateException.java
+++ b/src/main/java/freemarker/template/TemplateException.java
@@ -606,18 +606,22 @@
             this.out = out;
         }
 
+        @Override
         public void print(Object obj) {
             out.print(obj);
         }
 
+        @Override
         public void println(Object obj) {
             out.println(obj);
         }
 
+        @Override
         public void println() {
             out.println();
         }
 
+        @Override
         public void printStandardStackTrace(Throwable exception) {
             if (exception instanceof TemplateException) {
                 ((TemplateException) exception).printStandardStackTrace(out);
@@ -636,18 +640,22 @@
             this.out = out;
         }
 
+        @Override
         public void print(Object obj) {
             out.print(obj);
         }
 
+        @Override
         public void println(Object obj) {
             out.println(obj);
         }
 
+        @Override
         public void println() {
             out.println();
         }
 
+        @Override
         public void printStandardStackTrace(Throwable exception) {
             if (exception instanceof TemplateException) {
                 ((TemplateException) exception).printStandardStackTrace(out);
diff --git a/src/main/java/freemarker/template/TemplateExceptionHandler.java b/src/main/java/freemarker/template/TemplateExceptionHandler.java
index d1c25e9..628f011 100644
--- a/src/main/java/freemarker/template/TemplateExceptionHandler.java
+++ b/src/main/java/freemarker/template/TemplateExceptionHandler.java
@@ -59,6 +59,7 @@
     * other {@link TemplateExceptionHandler}-s.
     */
     TemplateExceptionHandler IGNORE_HANDLER = new TemplateExceptionHandler() {
+        @Override
         public void handleTemplateException(TemplateException te, Environment env, Writer out) {
             // Do nothing
         }
@@ -69,6 +70,7 @@
      * in most production systems.
      */
     TemplateExceptionHandler RETHROW_HANDLER = new TemplateExceptionHandler() {
+        @Override
         public void handleTemplateException(TemplateException te, Environment env, Writer out)
                 throws TemplateException {
             throw te;
@@ -80,6 +82,7 @@
      * handler outputs the stack trace information to the client and then re-throws the exception.
      */
     TemplateExceptionHandler DEBUG_HANDLER = new TemplateExceptionHandler() {
+        @Override
         public void handleTemplateException(TemplateException te, Environment env, Writer out)
                 throws TemplateException {
             if (!env.isInAttemptBlock()) {
@@ -99,6 +102,7 @@
      * well readable in the browser, and then re-throws the exception.
      */
     TemplateExceptionHandler HTML_DEBUG_HANDLER = new TemplateExceptionHandler() {
+        @Override
         public void handleTemplateException(TemplateException te, Environment env, Writer out)
                 throws TemplateException {
             if (!env.isInAttemptBlock()) {
diff --git a/src/main/java/freemarker/template/TemplateMethodModelEx.java b/src/main/java/freemarker/template/TemplateMethodModelEx.java
index 689aa70..60ccb37 100644
--- a/src/main/java/freemarker/template/TemplateMethodModelEx.java
+++ b/src/main/java/freemarker/template/TemplateMethodModelEx.java
@@ -48,6 +48,7 @@
      *     wrapped using the {@link Environment#getObjectWrapper() environment's 
      *     object wrapper}.
      */
+    @Override
     public Object exec(List arguments) throws TemplateModelException;
     
 }
\ No newline at end of file
diff --git a/src/main/java/freemarker/template/TemplateModelListSequence.java b/src/main/java/freemarker/template/TemplateModelListSequence.java
index 2077e42..5f48c58 100644
--- a/src/main/java/freemarker/template/TemplateModelListSequence.java
+++ b/src/main/java/freemarker/template/TemplateModelListSequence.java
@@ -34,10 +34,12 @@
         this.list = list;
     }
 
+    @Override
     public TemplateModel get(int index) {
         return (TemplateModel) list.get(index);
     }
 
+    @Override
     public int size() {
         return list.size();
     }
diff --git a/src/main/java/freemarker/template/TrueTemplateBooleanModel.java b/src/main/java/freemarker/template/TrueTemplateBooleanModel.java
index da26499..5b24f9b 100644
--- a/src/main/java/freemarker/template/TrueTemplateBooleanModel.java
+++ b/src/main/java/freemarker/template/TrueTemplateBooleanModel.java
@@ -24,6 +24,7 @@
  */
 final class TrueTemplateBooleanModel implements SerializableTemplateBooleanModel {
 
+    @Override
     public boolean getAsBoolean() {
         return true;
     }
diff --git a/src/main/java/freemarker/template/utility/CaptureOutput.java b/src/main/java/freemarker/template/utility/CaptureOutput.java
index 9bab1f1..686090a 100644
--- a/src/main/java/freemarker/template/utility/CaptureOutput.java
+++ b/src/main/java/freemarker/template/utility/CaptureOutput.java
@@ -61,6 +61,7 @@
 @Deprecated
 public class CaptureOutput implements TemplateTransformModel {
 
+    @Override
     public Writer getWriter(final Writer out, final Map args) throws TemplateModelException {
         String errmsg = "Must specify the name of the variable in "
                 + "which to capture the output with the 'var' or 'local' or 'global' parameter.";
diff --git a/src/main/java/freemarker/template/utility/Constants.java b/src/main/java/freemarker/template/utility/Constants.java
index 8392c01..07ccdc0 100644
--- a/src/main/java/freemarker/template/utility/Constants.java
+++ b/src/main/java/freemarker/template/utility/Constants.java
@@ -62,10 +62,12 @@
     
     private static class EmptyIteratorModel implements TemplateModelIterator, Serializable {
 
+        @Override
         public TemplateModel next() throws TemplateModelException {
             throw new TemplateModelException("The collection has no more elements.");
         }
 
+        @Override
         public boolean hasNext() throws TemplateModelException {
             return false;
         }
@@ -76,6 +78,7 @@
     
     private static class EmptyCollectionModel implements TemplateCollectionModel, Serializable {
 
+        @Override
         public TemplateModelIterator iterator() throws TemplateModelException {
             return EMPTY_ITERATOR;
         }
@@ -86,10 +89,12 @@
     
     private static class EmptySequenceModel implements TemplateSequenceModel, Serializable {
         
+        @Override
         public TemplateModel get(int index) throws TemplateModelException {
             return null;
         }
     
+        @Override
         public int size() throws TemplateModelException {
             return 0;
         }
@@ -109,26 +114,32 @@
      */
     private static class EmptyHashModel implements TemplateHashModelEx2, Serializable {
         
+        @Override
         public int size() throws TemplateModelException {
             return 0;
         }
 
+        @Override
         public TemplateCollectionModel keys() throws TemplateModelException {
             return EMPTY_COLLECTION;
         }
 
+        @Override
         public TemplateCollectionModel values() throws TemplateModelException {
             return EMPTY_COLLECTION;
         }
 
+        @Override
         public TemplateModel get(String key) throws TemplateModelException {
             return null;
         }
 
+        @Override
         public boolean isEmpty() throws TemplateModelException {
             return true;
         }
 
+        @Override
         public KeyValuePairIterator keyValuePairIterator() throws TemplateModelException {
             return EMPTY_KEY_VALUE_PAIR_ITERATOR;
         }
@@ -145,10 +156,12 @@
             //
         }
 
+        @Override
         public boolean hasNext() throws TemplateModelException {
             return false;
         }
 
+        @Override
         public TemplateHashModelEx2.KeyValuePair next() throws TemplateModelException {
             throw new NoSuchElementException("Can't retrieve element from empty key-value pair iterator.");
         }
diff --git a/src/main/java/freemarker/template/utility/DOMNodeModel.java b/src/main/java/freemarker/template/utility/DOMNodeModel.java
index 404fe45..b1c6f1b 100644
--- a/src/main/java/freemarker/template/utility/DOMNodeModel.java
+++ b/src/main/java/freemarker/template/utility/DOMNodeModel.java
@@ -61,6 +61,7 @@
         this.node = node;
     }
 
+    @Override
     public TemplateModel get(String key) throws TemplateModelException {
         TemplateModel result = null;
         if (equivalenceTable.containsKey(key)) {
@@ -128,6 +129,7 @@
         return result;
     }
 
+    @Override
     public boolean isEmpty() {
         return false;
     }
@@ -216,6 +218,7 @@
 
 
     class AncestorByName implements TemplateMethodModel {
+        @Override
         public Object exec(List arguments) throws TemplateModelException {
             if (arguments.size() != 1) {
                 throw new TemplateModelException("Expecting exactly one string argument here");
@@ -243,6 +246,7 @@
             nodes = new TemplateModel[nodeList.getLength()];
         }
 
+        @Override
         public TemplateModel get(int index) {
             DOMNodeModel result = (DOMNodeModel) nodes[index];
             if (result == null) {
@@ -253,10 +257,12 @@
             return result;
         }
 
+        @Override
         public int size() {
             return nodes.length;
         }
 
+        @Override
         public Object exec(List arguments) throws TemplateModelException {
             if (arguments.size() != 1) {
                 throw new TemplateModelException("Expecting exactly one string argument here");
diff --git a/src/main/java/freemarker/template/utility/DateUtil.java b/src/main/java/freemarker/template/utility/DateUtil.java
index eb37ba4..a4db6e5 100644
--- a/src/main/java/freemarker/template/utility/DateUtil.java
+++ b/src/main/java/freemarker/template/utility/DateUtil.java
@@ -843,6 +843,7 @@
         private GregorianCalendar calendar;
         private TimeZone lastlySetTimeZone;
     
+        @Override
         public GregorianCalendar get(TimeZone tz, Date date) {
             if (calendar == null) {
                 calendar = new GregorianCalendar(tz, Locale.US);
@@ -869,6 +870,7 @@
         private GregorianCalendar calendar;
         private TimeZone lastlySetTimeZone;
 
+        @Override
         public Date calculate(int era, int year, int month, int day, int hours, int minutes, int secs, int millisecs,
                 boolean addOneDay, TimeZone tz) {
             if (calendar == null) {
diff --git a/src/main/java/freemarker/template/utility/Execute.java b/src/main/java/freemarker/template/utility/Execute.java
index 4542a08..d649b45 100644
--- a/src/main/java/freemarker/template/utility/Execute.java
+++ b/src/main/java/freemarker/template/utility/Execute.java
@@ -69,6 +69,7 @@
      * of the arguments passed to the method.
      * @return the <tt>TemplateModel</tt> produced by the method, or null.
      */
+    @Override
     public Object exec (List arguments) throws TemplateModelException {
         String aExecute;
         StringBuilder    aOutputBuffer = new StringBuilder();
diff --git a/src/main/java/freemarker/template/utility/HtmlEscape.java b/src/main/java/freemarker/template/utility/HtmlEscape.java
index 6b6f100..c8bd79d 100644
--- a/src/main/java/freemarker/template/utility/HtmlEscape.java
+++ b/src/main/java/freemarker/template/utility/HtmlEscape.java
@@ -59,6 +59,7 @@
     private static final char[] AMP = "&amp;".toCharArray();
     private static final char[] QUOT = "&quot;".toCharArray();
 
+    @Override
     public Writer getWriter(final Writer out, Map args) {
         return new Writer()
         {
diff --git a/src/main/java/freemarker/template/utility/JythonRuntime.java b/src/main/java/freemarker/template/utility/JythonRuntime.java
index 91e8625..026c638 100644
--- a/src/main/java/freemarker/template/utility/JythonRuntime.java
+++ b/src/main/java/freemarker/template/utility/JythonRuntime.java
@@ -35,6 +35,7 @@
 
 public class JythonRuntime extends PythonInterpreter
     implements TemplateTransformModel {
+    @Override
     public Writer getWriter(final Writer out,
                             final Map args) {
         final StringBuilder buf = new StringBuilder();
diff --git a/src/main/java/freemarker/template/utility/NormalizeNewlines.java b/src/main/java/freemarker/template/utility/NormalizeNewlines.java
index 59d5e00..e75a24c 100644
--- a/src/main/java/freemarker/template/utility/NormalizeNewlines.java
+++ b/src/main/java/freemarker/template/utility/NormalizeNewlines.java
@@ -63,6 +63,7 @@
  */
 public class NormalizeNewlines implements TemplateTransformModel {
 
+    @Override
     public Writer getWriter(final Writer out,
                             final Map args) {
         final StringBuilder buf = new StringBuilder();
diff --git a/src/main/java/freemarker/template/utility/ObjectConstructor.java b/src/main/java/freemarker/template/utility/ObjectConstructor.java
index 1473160..1f8565b 100644
--- a/src/main/java/freemarker/template/utility/ObjectConstructor.java
+++ b/src/main/java/freemarker/template/utility/ObjectConstructor.java
@@ -39,6 +39,7 @@
  * <br>&lt;#assign aList = objectConstructor("java.util.ArrayList", 100)&gt;
  */
 public class ObjectConstructor implements TemplateMethodModelEx {
+    @Override
     public Object exec(List args) throws TemplateModelException {
         if (args.isEmpty()) {
             throw new TemplateModelException("This method must have at least one argument, the name of the class to instantiate.");
diff --git a/src/main/java/freemarker/template/utility/SecurityUtilities.java b/src/main/java/freemarker/template/utility/SecurityUtilities.java
index a38d502..de6b3a9 100644
--- a/src/main/java/freemarker/template/utility/SecurityUtilities.java
+++ b/src/main/java/freemarker/template/utility/SecurityUtilities.java
@@ -36,6 +36,7 @@
         return (String) AccessController.doPrivileged(
             new PrivilegedAction()
             {
+                @Override
                 public Object run() {
                     return System.getProperty(key);
                 }
@@ -47,6 +48,7 @@
             return (String) AccessController.doPrivileged(
                 new PrivilegedAction()
                 {
+                    @Override
                     public Object run() {
                         return System.getProperty(key, defValue);
                     }
@@ -64,6 +66,7 @@
             return (Integer) AccessController.doPrivileged(
                 new PrivilegedAction()
                 {
+                    @Override
                     public Object run() {
                         return Integer.getInteger(key, defValue);
                     }
diff --git a/src/main/java/freemarker/template/utility/StandardCompress.java b/src/main/java/freemarker/template/utility/StandardCompress.java
index 571afa7..b1d8078 100644
--- a/src/main/java/freemarker/template/utility/StandardCompress.java
+++ b/src/main/java/freemarker/template/utility/StandardCompress.java
@@ -87,6 +87,7 @@
         this.defaultBufferSize = defaultBufferSize;
     }
 
+    @Override
     public Writer getWriter(final Writer out, Map args)
     throws TemplateModelException {
         int bufferSize = defaultBufferSize;
diff --git a/src/main/java/freemarker/template/utility/TemplateModelUtils.java b/src/main/java/freemarker/template/utility/TemplateModelUtils.java
index e04d99f..4efff56 100644
--- a/src/main/java/freemarker/template/utility/TemplateModelUtils.java
+++ b/src/main/java/freemarker/template/utility/TemplateModelUtils.java
@@ -78,10 +78,12 @@
             keyIter = hash.keys().iterator();
         }
 
+        @Override
         public boolean hasNext() throws TemplateModelException {
             return keyIter.hasNext();
         }
 
+        @Override
         public KeyValuePair next() throws TemplateModelException {
             final TemplateModel key = keyIter.next();
             if (!(key instanceof TemplateScalarModel)) {
@@ -90,10 +92,12 @@
 
             return new KeyValuePair() {
 
+                @Override
                 public TemplateModel getKey() throws TemplateModelException {
                     return key;
                 }
 
+                @Override
                 public TemplateModel getValue() throws TemplateModelException {
                     return hash.get(((TemplateScalarModel) key).getAsString());
                 }
@@ -195,6 +199,7 @@
             this.hashes = hashes;
         }
 
+        @Override
         public TemplateModel get(String key) throws TemplateModelException {
             for (int i = hashes.size() - 1; i >= 0; i--) {
                 TemplateModel value = hashes.get(i).get(key);
@@ -205,6 +210,7 @@
             return null;
         }
 
+        @Override
         public boolean isEmpty() throws TemplateModelException {
             for (TemplateHashModel hash : hashes) {
                 if (!hash.isEmpty()) {
@@ -231,16 +237,19 @@
             super(hashes);
         }
         
+        @Override
         public int size() throws TemplateModelException {
             initKeys();
             return keys.size();
         }
 
+        @Override
         public TemplateCollectionModel keys() throws TemplateModelException {
             initKeys();
             return keys;
         }
 
+        @Override
         public TemplateCollectionModel values() throws TemplateModelException {
             initValues();
             return values;
diff --git a/src/main/java/freemarker/template/utility/XmlEscape.java b/src/main/java/freemarker/template/utility/XmlEscape.java
index cbf823f..ac6fb71 100644
--- a/src/main/java/freemarker/template/utility/XmlEscape.java
+++ b/src/main/java/freemarker/template/utility/XmlEscape.java
@@ -40,6 +40,7 @@
     private static final char[] QUOT = "&quot;".toCharArray();
     private static final char[] APOS = "&apos;".toCharArray();
 
+    @Override
     public Writer getWriter(final Writer out, Map args) {
         return new Writer()
         {