Make Logger instance final as SL4J suggests
diff --git a/src/main/java/net/floodlightcontroller/core/internal/Controller.java b/src/main/java/net/floodlightcontroller/core/internal/Controller.java
index 134a3b0..17f1be8 100644
--- a/src/main/java/net/floodlightcontroller/core/internal/Controller.java
+++ b/src/main/java/net/floodlightcontroller/core/internal/Controller.java
@@ -152,7 +152,7 @@
 public class Controller implements IFloodlightProviderService, 
             IStorageSourceListener {
     
-    protected static Logger log = LoggerFactory.getLogger(Controller.class);
+    protected final static Logger log = LoggerFactory.getLogger(Controller.class);
 
     private static final String ERROR_DATABASE = 
             "The controller could not communicate with the system database.";
diff --git a/src/main/java/net/floodlightcontroller/core/internal/OFSwitchImpl.java b/src/main/java/net/floodlightcontroller/core/internal/OFSwitchImpl.java
index 467c74a..5810967 100644
--- a/src/main/java/net/floodlightcontroller/core/internal/OFSwitchImpl.java
+++ b/src/main/java/net/floodlightcontroller/core/internal/OFSwitchImpl.java
@@ -79,7 +79,7 @@
 public class OFSwitchImpl implements IOFSwitch, IOnosRemoteSwitch {
     // TODO: should we really do logging in the class or should we throw
     // exception that can then be handled by callers?
-    protected static Logger log = LoggerFactory.getLogger(OFSwitchImpl.class);
+    protected final static Logger log = LoggerFactory.getLogger(OFSwitchImpl.class);
 
     private static final String HA_CHECK_SWITCH = 
             "Check the health of the indicated switch.  If the problem " +
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. 
      */
diff --git a/src/main/java/net/floodlightcontroller/core/module/FloodlightModuleLoader.java b/src/main/java/net/floodlightcontroller/core/module/FloodlightModuleLoader.java
index 5561327..2686d00 100644
--- a/src/main/java/net/floodlightcontroller/core/module/FloodlightModuleLoader.java
+++ b/src/main/java/net/floodlightcontroller/core/module/FloodlightModuleLoader.java
@@ -32,7 +32,7 @@
  *
  */
 public class FloodlightModuleLoader {
-    protected static Logger logger = 
+    protected final static Logger logger = 
             LoggerFactory.getLogger(FloodlightModuleLoader.class);
 
     protected static Map<Class<? extends IFloodlightService>,
diff --git a/src/main/java/net/floodlightcontroller/core/module/ModuleLoaderResource.java b/src/main/java/net/floodlightcontroller/core/module/ModuleLoaderResource.java
index a73a17f..7f7b903 100644
--- a/src/main/java/net/floodlightcontroller/core/module/ModuleLoaderResource.java
+++ b/src/main/java/net/floodlightcontroller/core/module/ModuleLoaderResource.java
@@ -17,7 +17,7 @@
  * @author Rob Sherwood
  */
 public class ModuleLoaderResource extends ServerResource {
-    protected static Logger log = 
+    protected final static Logger log = 
             LoggerFactory.getLogger(ModuleLoaderResource.class);
     
     /**
diff --git a/src/main/java/net/floodlightcontroller/core/util/ListenerDispatcher.java b/src/main/java/net/floodlightcontroller/core/util/ListenerDispatcher.java
index 58b543c..ea63c25 100644
--- a/src/main/java/net/floodlightcontroller/core/util/ListenerDispatcher.java
+++ b/src/main/java/net/floodlightcontroller/core/util/ListenerDispatcher.java
@@ -34,7 +34,7 @@
  *
  */
 public class ListenerDispatcher<U, T extends IListener<U>> {
-    protected static Logger logger = LoggerFactory.getLogger(ListenerDispatcher.class);
+    protected final static Logger logger = LoggerFactory.getLogger(ListenerDispatcher.class);
     List<T> listeners = null;
     
     private void visit(List<T> newlisteners, U type, HashSet<T> visited, 
diff --git a/src/main/java/net/floodlightcontroller/core/util/SingletonTask.java b/src/main/java/net/floodlightcontroller/core/util/SingletonTask.java
index 07729e5..0e03144 100644
--- a/src/main/java/net/floodlightcontroller/core/util/SingletonTask.java
+++ b/src/main/java/net/floodlightcontroller/core/util/SingletonTask.java
@@ -37,7 +37,7 @@
  * * If the task has begun, set a bit to restart it after the current task finishes
  */
 public class SingletonTask {
-    protected static Logger logger = LoggerFactory.getLogger(SingletonTask.class);
+    protected final static Logger logger = LoggerFactory.getLogger(SingletonTask.class);
             
     protected static class SingletonTaskContext  {
         protected boolean taskShouldRun = false;
diff --git a/src/main/java/net/floodlightcontroller/core/web/AllSwitchStatisticsResource.java b/src/main/java/net/floodlightcontroller/core/web/AllSwitchStatisticsResource.java
index d012fc8..a014795 100644
--- a/src/main/java/net/floodlightcontroller/core/web/AllSwitchStatisticsResource.java
+++ b/src/main/java/net/floodlightcontroller/core/web/AllSwitchStatisticsResource.java
@@ -39,7 +39,7 @@
  * @author readams
  */
 public class AllSwitchStatisticsResource extends SwitchResourceBase {
-    protected static Logger log = 
+    protected final static Logger log = 
         LoggerFactory.getLogger(AllSwitchStatisticsResource.class);
     
     @Get("json")
diff --git a/src/main/java/net/floodlightcontroller/core/web/ControllerRoleResource.java b/src/main/java/net/floodlightcontroller/core/web/ControllerRoleResource.java
index 652058e..2ed87cb 100644
--- a/src/main/java/net/floodlightcontroller/core/web/ControllerRoleResource.java
+++ b/src/main/java/net/floodlightcontroller/core/web/ControllerRoleResource.java
@@ -14,7 +14,7 @@
 
 public class ControllerRoleResource extends ServerResource {
 
-    protected static Logger log = LoggerFactory.getLogger(ControllerRoleResource.class);
+    protected final static Logger log = LoggerFactory.getLogger(ControllerRoleResource.class);
 
     @Get("json")
     public RoleInfo getRole() {
diff --git a/src/main/java/net/floodlightcontroller/core/web/EventHistoryTopologyClusterResource.java b/src/main/java/net/floodlightcontroller/core/web/EventHistoryTopologyClusterResource.java
index 648866f..d1888d3 100644
--- a/src/main/java/net/floodlightcontroller/core/web/EventHistoryTopologyClusterResource.java
+++ b/src/main/java/net/floodlightcontroller/core/web/EventHistoryTopologyClusterResource.java
@@ -16,7 +16,7 @@
  */
 public class EventHistoryTopologyClusterResource extends ServerResource {
     // TODO - Move this to the LinkDiscovery rest API
-    protected static Logger log = 
+    protected final static Logger log = 
             LoggerFactory.getLogger(EventHistoryTopologyClusterResource.class);
 
     @Get("json")
diff --git a/src/main/java/net/floodlightcontroller/core/web/EventHistoryTopologyLinkResource.java b/src/main/java/net/floodlightcontroller/core/web/EventHistoryTopologyLinkResource.java
index 79c4006..e497228 100644
--- a/src/main/java/net/floodlightcontroller/core/web/EventHistoryTopologyLinkResource.java
+++ b/src/main/java/net/floodlightcontroller/core/web/EventHistoryTopologyLinkResource.java
@@ -16,7 +16,7 @@
  */
 public class EventHistoryTopologyLinkResource extends ServerResource {
     // TODO - Move this to the DeviceManager Rest API
-    protected static Logger log = 
+    protected final static Logger log = 
             LoggerFactory.getLogger(EventHistoryTopologyLinkResource.class);
 
     @Get("json")
diff --git a/src/main/java/net/floodlightcontroller/core/web/SwitchResourceBase.java b/src/main/java/net/floodlightcontroller/core/web/SwitchResourceBase.java
index d810024..1c138f6 100644
--- a/src/main/java/net/floodlightcontroller/core/web/SwitchResourceBase.java
+++ b/src/main/java/net/floodlightcontroller/core/web/SwitchResourceBase.java
@@ -48,7 +48,7 @@
  *
  */
 public class SwitchResourceBase extends ServerResource {
-    protected static Logger log = LoggerFactory.getLogger(SwitchResourceBase.class);
+    protected final static Logger log = LoggerFactory.getLogger(SwitchResourceBase.class);
     
     public enum REQUESTTYPE {
         OFSTATS,
diff --git a/src/main/java/net/floodlightcontroller/core/web/SwitchRoleResource.java b/src/main/java/net/floodlightcontroller/core/web/SwitchRoleResource.java
index 0d73f93..944c725 100644
--- a/src/main/java/net/floodlightcontroller/core/web/SwitchRoleResource.java
+++ b/src/main/java/net/floodlightcontroller/core/web/SwitchRoleResource.java
@@ -14,7 +14,7 @@
 
 public class SwitchRoleResource extends ServerResource {
 
-    protected static Logger log = LoggerFactory.getLogger(SwitchRoleResource.class);
+    protected final static Logger log = LoggerFactory.getLogger(SwitchRoleResource.class);
 
     @Get("json")
     public Object getRole() {
diff --git a/src/main/java/net/floodlightcontroller/core/web/SwitchStatisticsResource.java b/src/main/java/net/floodlightcontroller/core/web/SwitchStatisticsResource.java
index 57771f7..a0cada7 100644
--- a/src/main/java/net/floodlightcontroller/core/web/SwitchStatisticsResource.java
+++ b/src/main/java/net/floodlightcontroller/core/web/SwitchStatisticsResource.java
@@ -30,7 +30,7 @@
  * @author readams
  */
 public class SwitchStatisticsResource extends SwitchResourceBase {
-    protected static Logger log = 
+    protected final static Logger log = 
         LoggerFactory.getLogger(SwitchStatisticsResource.class);
 
     @Get("json")