Fixed jdk7 compat

Author: krosenvold

src/main/java/org/codehaus/plexus/archiver/diags/NoOpArchiver.java

@@ -232,6 +232,11 @@ public ArchiveEntry next()
             {
                 return null;
             }
+
+            public void remove() {
+                throw new UnsupportedOperationException("remove");
+            }
+
         };
     }
 

src/main/java/org/codehaus/plexus/archiver/diags/TrackingArchiver.java

@@ -23,7 +23,6 @@
 import org.codehaus.plexus.components.io.resources.PlexusIoResource;
 import org.codehaus.plexus.components.io.resources.PlexusIoResourceCollection;
 import org.codehaus.plexus.util.StringUtils;
-import sun.reflect.generics.reflectiveObjects.NotImplementedException;
 
 import javax.annotation.Nonnull;
 import java.io.File;
@@ -225,7 +224,7 @@ public void setDotFileDirectory( final File dotFileDirectory )
     ResourceIterator getResources()
         throws ArchiverException
     {
-        throw new NotImplementedException();
+        throw new RuntimeException("Not implemented");
     }
 
     @SuppressWarnings( "rawtypes" )