Fully implements application shutdown procedure that is invoked when the

user closes the the main gui window or invokes exit from the file menu.

src/main/java/io/github/dsheirer/source/tuner/test/TestTunerController.java

@@ -65,6 +65,12 @@ public class TestTunerController extends TunerController
         }
     }
 
+    @Override
+    public void dispose()
+    {
+        //no-op
+    }
+
     @Override
     public void addBufferListener(Listener<ReusableComplexBuffer> listener)
     {