Fix checkstyle whitespace issues - WHITESPACE ONLY

Change-Id: Ic205c1afd639c6008d61d9de95cb764eeb6238ca
diff --git a/src/main/java/net/floodlightcontroller/core/IOFMessageListener.java b/src/main/java/net/floodlightcontroller/core/IOFMessageListener.java
index 00fdac1..b14af57 100644
--- a/src/main/java/net/floodlightcontroller/core/IOFMessageListener.java
+++ b/src/main/java/net/floodlightcontroller/core/IOFMessageListener.java
@@ -1,19 +1,19 @@
 /**
-*    Copyright 2011, Big Switch Networks, Inc. 
-*    Originally created by David Erickson, Stanford University
-* 
-*    Licensed under the Apache License, Version 2.0 (the "License"); you may
-*    not use this file except in compliance with the License. You may obtain
-*    a copy of the License at
-*
-*         http://www.apache.org/licenses/LICENSE-2.0
-*
-*    Unless required by applicable law or agreed to in writing, software
-*    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-*    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-*    License for the specific language governing permissions and limitations
-*    under the License.
-**/
+ *    Copyright 2011, Big Switch Networks, Inc.
+ *    Originally created by David Erickson, Stanford University
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *    not use this file except in compliance with the License. You may obtain
+ *    a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ *    License for the specific language governing permissions and limitations
+ *    under the License.
+ **/
 
 package net.floodlightcontroller.core;
 
@@ -21,18 +21,17 @@
 import org.openflow.protocol.OFType;
 
 /**
- *
- *
  * @author David Erickson (daviderickson@cs.stanford.edu)
  */
 public interface IOFMessageListener extends IListener<OFType> {
-  /**
-   * This is the method Floodlight uses to call listeners with OpenFlow messages
-   * @param sw the OpenFlow switch that sent this message
-   * @param msg the message
-   * @param cntx a Floodlight message context object you can use to pass 
-   * information between listeners
-   * @return the command to continue or stop the execution
-   */
-  public Command receive(IOFSwitch sw, OFMessage msg, FloodlightContext cntx);
+    /**
+     * This is the method Floodlight uses to call listeners with OpenFlow messages
+     *
+     * @param sw   the OpenFlow switch that sent this message
+     * @param msg  the message
+     * @param cntx a Floodlight message context object you can use to pass
+     *             information between listeners
+     * @return the command to continue or stop the execution
+     */
+    public Command receive(IOFSwitch sw, OFMessage msg, FloodlightContext cntx);
 }