Make Logger instance final as SL4J suggests
diff --git a/src/main/java/net/onrc/onos/ofcontroller/topology/TopologyManager.java b/src/main/java/net/onrc/onos/ofcontroller/topology/TopologyManager.java
index 81ff599..ccb64f8 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/topology/TopologyManager.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/topology/TopologyManager.java
@@ -25,7 +25,7 @@
  */
 public class TopologyManager implements IFloodlightModule,
 					ITopologyNetService {
-    private static Logger log = LoggerFactory.getLogger(TopologyManager.class);
+    private final static Logger log = LoggerFactory.getLogger(TopologyManager.class);
     protected IFloodlightProviderService floodlightProvider;
 
     protected GraphDBOperation dbHandler;
diff --git a/src/main/java/net/onrc/onos/ofcontroller/topology/web/RouteResource.java b/src/main/java/net/onrc/onos/ofcontroller/topology/web/RouteResource.java
index 1cb39b3..b340996 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/topology/web/RouteResource.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/topology/web/RouteResource.java
@@ -14,7 +14,7 @@
 
 public class RouteResource extends ServerResource {
 
-    protected static Logger log = LoggerFactory.getLogger(RouteResource.class);
+    protected final static Logger log = LoggerFactory.getLogger(RouteResource.class);
 
     @Get("json")
     public DataPath retrieve() {