Fix test for LinkDicoveryManager
diff --git a/src/test/java/net/floodlightcontroller/core/internal/ControllerTest.java b/src/test/java/net/floodlightcontroller/core/internal/ControllerTest.java
index a6948c0..5aea937 100644
--- a/src/test/java/net/floodlightcontroller/core/internal/ControllerTest.java
+++ b/src/test/java/net/floodlightcontroller/core/internal/ControllerTest.java
@@ -545,6 +545,11 @@
                 nPortChanged++;
                 notifyAll();
             }
+
+            @Override
+            public void switchPortAdded(Long switchId, OFPhysicalPort port) {};
+            @Override
+            public void switchPortRemoved(Long switchId, OFPhysicalPort port) {};
         }
         DummySwitchListener switchListener = new DummySwitchListener();
         IOFSwitch sw = createMock(IOFSwitch.class);