Make Logger instance final as SL4J suggests
diff --git a/src/main/java/net/floodlightcontroller/core/internal/RoleChanger.java b/src/main/java/net/floodlightcontroller/core/internal/RoleChanger.java
index 4924fbc..194935c 100644
--- a/src/main/java/net/floodlightcontroller/core/internal/RoleChanger.java
+++ b/src/main/java/net/floodlightcontroller/core/internal/RoleChanger.java
@@ -120,7 +120,7 @@
protected Thread workerThread;
protected long timeout;
protected static long DEFAULT_TIMEOUT = 15L*1000*1000*1000L; // 15s
- protected static Logger log = LoggerFactory.getLogger(RoleChanger.class);
+ protected final static Logger log = LoggerFactory.getLogger(RoleChanger.class);
/**
* A queued task to be handled by the Role changer thread.
*/