o Updated to add missing '@OverRide' annotations.

o Added method 'isOverwrite' to interface 'UnArchiver'.

Author: ChristianSchulte

src/main/java/org/codehaus/plexus/archiver/AbstractArchiveFinalizer.java

@@ -8,11 +8,13 @@ protected AbstractArchiveFinalizer()
     {
     }
 
+    @Override
     public void finalizeArchiveCreation( Archiver archiver )
         throws ArchiverException
     {
     }
 
+    @Override
     public void finalizeArchiveExtraction( UnArchiver unarchiver )
         throws ArchiverException
     {