Fix warnings.

Change-Id: I98f8ea3f69befe2d3642bbb2f158ab62c5a7a575
diff --git a/src/main/java/com/google/gwt/site/webapp/client/GWTProjectEntryPoint.java b/src/main/java/com/google/gwt/site/webapp/client/GWTProjectEntryPoint.java
index 50d3de0..67f5fb8 100644
--- a/src/main/java/com/google/gwt/site/webapp/client/GWTProjectEntryPoint.java
+++ b/src/main/java/com/google/gwt/site/webapp/client/GWTProjectEntryPoint.java
@@ -159,9 +159,10 @@
 
     // Note: gQuery will support $(window).on("popstate", function) in future releases.
     window.<Properties>cast().setFunction("onpopstate", new Function() {
+      @Override
       public void f() {
         loadPage(null);
-      };
+      }
     });
   }
 }