Remove warnings.
diff --git a/jena-geosparql/src/main/java/org/apache/jena/geosparql/configuration/GeoSPARQLOperations.java b/jena-geosparql/src/main/java/org/apache/jena/geosparql/configuration/GeoSPARQLOperations.java
index a8e395e..e8dcc4f 100644
--- a/jena-geosparql/src/main/java/org/apache/jena/geosparql/configuration/GeoSPARQLOperations.java
+++ b/jena-geosparql/src/main/java/org/apache/jena/geosparql/configuration/GeoSPARQLOperations.java
@@ -61,7 +61,6 @@
 import org.apache.jena.riot.Lang;
 import org.apache.jena.riot.RDFDataMgr;
 import org.apache.jena.util.iterator.ExtendedIterator;
-import org.apache.jena.util.iterator.NiceIterator;
 import org.apache.jena.vocabulary.RDFS;
 import org.opengis.geometry.MismatchedDimensionException;
 import org.opengis.referencing.operation.TransformException;
@@ -1121,12 +1120,11 @@
      */
     public static final int countGeometryLiterals(Model model, String graphName) {
         Set<String> literalStrings = new TreeSet<>();
-        Iterator<Statement> hasSerializationIterator = model.listStatements(null, Geo.HAS_SERIALIZATION_PROP, (RDFNode) null);
-        Iterator<Statement> asWKTIterator = model.listStatements(null, Geo.AS_WKT_PROP, (RDFNode) null);
-        Iterator<Statement> asGMLIterator = model.listStatements(null, Geo.AS_GML_PROP, (RDFNode) null);
+        ExtendedIterator<Statement> hasSerializationIterator = model.listStatements(null, Geo.HAS_SERIALIZATION_PROP, (RDFNode) null);
+        ExtendedIterator<Statement> asWKTIterator = model.listStatements(null, Geo.AS_WKT_PROP, (RDFNode) null);
+        ExtendedIterator<Statement> asGMLIterator = model.listStatements(null, Geo.AS_GML_PROP, (RDFNode) null);
 
-        NiceIterator niceIterator = new NiceIterator();
-        ExtendedIterator<Statement> allIterator = niceIterator.andThen(hasSerializationIterator).andThen(asWKTIterator).andThen(asGMLIterator);
+        ExtendedIterator<Statement> allIterator = hasSerializationIterator.andThen(asWKTIterator).andThen(asGMLIterator);
         int count = 0;
         while (allIterator.hasNext()) {
             Statement st = allIterator.next();
diff --git a/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/metadata/JenaMetadata.java b/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/metadata/JenaMetadata.java
index 9d06c15..a09ee27 100644
--- a/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/metadata/JenaMetadata.java
+++ b/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/metadata/JenaMetadata.java
@@ -1219,14 +1219,13 @@
     @Override
     public abstract boolean usesLocalFiles();
 
-    @SuppressWarnings("javadoc")
+    @Override
     public ResultSet getPseudoColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern)
             throws SQLException {
         return new MetaResultSet(MetadataSchema.getPsuedoColumnColumns());
     }
 
-    // Java 6/7 compatibility
-    @SuppressWarnings("javadoc")
+    @Override
     public boolean generatedKeyAlwaysReturned() {
         // We don't support returning keys
         return false;
diff --git a/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/results/JenaResultSet.java b/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/results/JenaResultSet.java
index c4d6209..22ef206 100644
--- a/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/results/JenaResultSet.java
+++ b/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/results/JenaResultSet.java
@@ -633,12 +633,12 @@
         throw new SQLFeatureNotSupportedException("Only the single argument form of getObject() is supported");
     }
     
-    @SuppressWarnings("javadoc")
+    @Override
     public <T> T getObject(int columnIndex, Class<T> type) throws SQLException {
         throw new SQLFeatureNotSupportedException("Only the single argument form of getObject() is supported");
     }
     
-    @SuppressWarnings("javadoc")
+    @Override
     public <T> T getObject(String columnLabel,  Class<T> type) throws SQLException {
         throw new SQLFeatureNotSupportedException("Only the single argument form of getObject() is supported");
     }
diff --git a/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/statements/JenaStatement.java b/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/statements/JenaStatement.java
index 3d4e0ee..cb6f00f 100644
--- a/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/statements/JenaStatement.java
+++ b/jena-jdbc/jena-jdbc-core/src/main/java/org/apache/jena/jdbc/statements/JenaStatement.java
@@ -881,17 +881,15 @@
         }
     }
 
-    // Java 6/7 compatibility
-    @SuppressWarnings("javadoc")
+    @Override
     public boolean isCloseOnCompletion() {
         // Statements do not automatically close
         return false;
     }
 
-    @SuppressWarnings("javadoc")
+    @Override
     public void closeOnCompletion() throws SQLException {
-        // We don't support the JDBC 4.1 feature of closing statements
-        // automatically
+        // We don't support the JDBC 4.1 feature of closing statements automatically
         throw new SQLFeatureNotSupportedException();
     }
 }