TAMAYA-218: Fix warnings.
diff --git a/metamodel/src/main/java/org/apache/tamaya/metamodel/CachedFilter.java b/metamodel/src/main/java/org/apache/tamaya/metamodel/CachedFilter.java
index d2a343c..b9cd370 100644
--- a/metamodel/src/main/java/org/apache/tamaya/metamodel/CachedFilter.java
+++ b/metamodel/src/main/java/org/apache/tamaya/metamodel/CachedFilter.java
@@ -109,8 +109,8 @@
     }
 
     private static final class CachedEntry{
-        long ttl;
-        PropertyValue value;
+        private long ttl;
+        private PropertyValue value;
 
         public CachedEntry (PropertyValue value, long ttl){
             this.ttl = ttl;
diff --git a/metamodel/src/main/java/org/apache/tamaya/metamodel/EnabledPropertySource.java b/metamodel/src/main/java/org/apache/tamaya/metamodel/EnabledPropertySource.java
index 2dcf101..3eafd38 100644
--- a/metamodel/src/main/java/org/apache/tamaya/metamodel/EnabledPropertySource.java
+++ b/metamodel/src/main/java/org/apache/tamaya/metamodel/EnabledPropertySource.java
@@ -18,19 +18,16 @@
  */
 package org.apache.tamaya.metamodel;
 
-import org.apache.tamaya.metamodel.internal.resolver.JavaResolver;
-import org.apache.tamaya.spi.PropertySource;
-import org.apache.tamaya.spi.PropertyValue;
-import org.apache.tamaya.spisupport.PropertySourceComparator;
-
-import javax.script.ScriptEngine;
-import javax.script.ScriptEngineManager;
-import javax.script.ScriptException;
 import java.util.Collections;
 import java.util.Map;
 import java.util.Objects;
 import java.util.logging.Logger;
 
+import org.apache.tamaya.metamodel.internal.resolver.JavaResolver;
+import org.apache.tamaya.spi.PropertySource;
+import org.apache.tamaya.spi.PropertyValue;
+import org.apache.tamaya.spisupport.PropertySourceComparator;
+
 
 /**
  * Wrapped property source that allows enabling a property source using an
@@ -113,7 +110,7 @@
 
     @Override
     public String toString() {
-        return "DynamicPropertySource{" +
+        return "EnabledPropertySource{" +
                 "\n enabled=" + enabledExpression +
                 "\n wrapped=" + wrapped +
                 '}';
diff --git a/metamodel/src/main/java/org/apache/tamaya/metamodel/HideFilter.java b/metamodel/src/main/java/org/apache/tamaya/metamodel/HideFilter.java
index 6a1e116..7e02333 100644
--- a/metamodel/src/main/java/org/apache/tamaya/metamodel/HideFilter.java
+++ b/metamodel/src/main/java/org/apache/tamaya/metamodel/HideFilter.java
@@ -18,13 +18,12 @@
  */
 package org.apache.tamaya.metamodel;
 
+import java.util.Map;
+
 import org.apache.tamaya.metamodel.spi.ItemFactory;
 import org.apache.tamaya.spi.FilterContext;
 import org.apache.tamaya.spi.PropertyFilter;
 import org.apache.tamaya.spi.PropertyValue;
-import org.apache.tamaya.spi.PropertyValueBuilder;
-
-import java.util.Map;
 
 /**
  * Simple filter that never changes a key/value pair returned, regardless if a value
diff --git a/metamodel/src/main/java/org/apache/tamaya/metamodel/MetaConfiguration.java b/metamodel/src/main/java/org/apache/tamaya/metamodel/MetaConfiguration.java
index d896cb0..a08e418 100644
--- a/metamodel/src/main/java/org/apache/tamaya/metamodel/MetaConfiguration.java
+++ b/metamodel/src/main/java/org/apache/tamaya/metamodel/MetaConfiguration.java
@@ -18,18 +18,6 @@
  */
 package org.apache.tamaya.metamodel;
 
-import org.apache.tamaya.ConfigException;
-import org.apache.tamaya.Configuration;
-import org.apache.tamaya.ConfigurationProvider;
-import org.apache.tamaya.metamodel.spi.MetaConfigurationReader;
-import org.apache.tamaya.spi.ConfigurationBuilder;
-import org.apache.tamaya.spi.ConfigurationContext;
-import org.apache.tamaya.spi.ServiceContextManager;
-import org.w3c.dom.Document;
-import org.xml.sax.SAXException;
-
-import javax.xml.parsers.DocumentBuilderFactory;
-import javax.xml.parsers.ParserConfigurationException;
 import java.io.File;
 import java.io.IOException;
 import java.net.MalformedURLException;
@@ -38,6 +26,18 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.apache.tamaya.ConfigException;
+import org.apache.tamaya.Configuration;
+import org.apache.tamaya.ConfigurationProvider;
+import org.apache.tamaya.metamodel.spi.MetaConfigurationReader;
+import org.apache.tamaya.spi.ConfigurationBuilder;
+import org.apache.tamaya.spi.ServiceContextManager;
+import org.w3c.dom.Document;
+import org.xml.sax.SAXException;
+
 /**
  * Accessor singleton for accessing/loading meta-configuration.
  */
diff --git a/metamodel/src/main/java/org/apache/tamaya/metamodel/Refreshable.java b/metamodel/src/main/java/org/apache/tamaya/metamodel/Refreshable.java
index dc51554..60ece93 100644
--- a/metamodel/src/main/java/org/apache/tamaya/metamodel/Refreshable.java
+++ b/metamodel/src/main/java/org/apache/tamaya/metamodel/Refreshable.java
@@ -18,8 +18,6 @@
  */
 package org.apache.tamaya.metamodel;
 
-import org.apache.tamaya.spi.ConfigurationContext;
-
 /**
  * Common interface for refreshable items.
  */