Fix compile errors

src/test/java/org/jboss/netty/handler/ipfilter/IpFilterRuleTest.java

@@ -265,6 +265,16 @@ public class IpFilterRuleTest extends TestCase
                 // TODO Auto-generated method stub
                 return 0;
             }
+
+            @Override
+            public Object getAttachment() {
+                return null;
+            }
+
+            @Override
+            public void setAttachment(Object attachment) {
+                
+            }
             
         }, h, addr), 
         addr);