Make private static classes final

src/main/java/org/apache/commons/jxpath/ri/model/dynabeans/StrictLazyDynaBeanPointerFactory.java

@@ -37,7 +37,7 @@ public class StrictLazyDynaBeanPointerFactory implements NodePointerFactory {
     /**
      * Pointer implementation.
      */
-    private static class StrictLazyDynaBeanPointer extends DynaBeanPointer {
+    private static final class StrictLazyDynaBeanPointer extends DynaBeanPointer {
         private static final long serialVersionUID = 1L;
 
         private final LazyDynaBean lazyDynaBean;

src/main/java/org/apache/commons/jxpath/util/KeyManagerUtils.java

@@ -32,7 +32,7 @@ public class KeyManagerUtils {
     /**
      * Adapt KeyManager to implement ExtendedKeyManager.
      */
-    private static class SingleNodeExtendedKeyManager implements
+    private static final class SingleNodeExtendedKeyManager implements
             ExtendedKeyManager {
         private final KeyManager delegate;
 

src/test/java/org/apache/commons/jxpath/issues/JXPath177Test.java

@@ -64,7 +64,7 @@ private void doTest(final String xp, final String expected)
 
     }
 
-    private static class JXPathVariablesResolver implements Variables
+    private static final class JXPathVariablesResolver implements Variables
     {
 
         private static final long serialVersionUID = -1106360826446119597L;

src/test/java/org/apache/commons/jxpath/ri/compiler/ExtensionFunctionTest.java

@@ -384,7 +384,7 @@ public void testBCNodeSetHack() {
             Boolean.TRUE);
     }
 
-    private static class Context implements ExpressionContext {
+    private static final class Context implements ExpressionContext {
         private final Object object;
 
         public Context(final Object object) {

src/test/java/org/apache/commons/jxpath/util/ClassLoaderUtilTest.java

@@ -171,7 +171,7 @@ private void executeTestMethodUnderClassLoader(final ClassLoader cl, final Strin
    * whether the parent can/has loaded it.
    *
    */
-  private static class TestClassLoader extends ClassLoader {
+  private static final class TestClassLoader extends ClassLoader {
     private Class testCaseClass = null;
 
     public TestClassLoader(final ClassLoader classLoader) {