Make Logger instance final as SL4J suggests
diff --git a/src/main/java/net/floodlightcontroller/staticflowentry/StaticFlowEntryPusher.java b/src/main/java/net/floodlightcontroller/staticflowentry/StaticFlowEntryPusher.java
index 4ed59d7..d816d66 100644
--- a/src/main/java/net/floodlightcontroller/staticflowentry/StaticFlowEntryPusher.java
+++ b/src/main/java/net/floodlightcontroller/staticflowentry/StaticFlowEntryPusher.java
@@ -55,7 +55,7 @@
 public class StaticFlowEntryPusher 
     implements IOFSwitchListener, IFloodlightModule, IStaticFlowEntryPusherService,
         IStorageSourceListener, IOFMessageListener, IHAListener {
-    protected static Logger log = LoggerFactory.getLogger(StaticFlowEntryPusher.class);
+    protected final static Logger log = LoggerFactory.getLogger(StaticFlowEntryPusher.class);
     public static final String StaticFlowName = "staticflowentry";
     
     public static final int STATIC_FLOW_APP_ID = 10;