Add checkstyle check for trailing whitespace

smack-extensions/src/main/java/org/jivesoftware/smackx/muc/packet/MUCUser.java

@@ -475,7 +475,7 @@ public class MUCUser implements ExtensionElement {
             if (other instanceof Status) {
                 Status otherStatus = (Status) other;
                 return code.equals(otherStatus.getCode());
-            } 
+            }
             return false;
         }
 

smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/EventElementType.java

@@ -25,19 +25,19 @@ package org.jivesoftware.smackx.pubsub;
 public enum EventElementType
 {
 	/** A node has been associated or dissassociated with a collection node */
-	collection, 
+	collection,
 
 	/** A node has had its configuration changed */
-	configuration, 
+	configuration,
 
 	/** A node has been deleted */
-	delete, 
+	delete,
 
 	/** Items have been published to a node */
-	items, 
+	items,
 
 	/** All items have been purged from a node */
-	purge, 
+	purge,
 
 	/** A node has been subscribed to */
 	subscription

smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/SubscribeForm.java

@@ -39,7 +39,7 @@ import org.jivesoftware.smackx.xdata.packet.DataForm;
  * @author Robin Collier
  */
 public class SubscribeForm extends Form
-{	
+{
 	public SubscribeForm(DataForm configDataForm)
 	{
 		super(configDataForm);

smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/provider/ItemProvider.java

@@ -48,7 +48,7 @@ public class ItemProvider extends ExtensionElementProvider<Item>
         {
             return new Item(id, node);
         }
-        else 
+        else
         {
             String payloadElemName = parser.getName();
             String payloadNS = parser.getNamespace();
@@ -59,7 +59,7 @@ public class ItemProvider extends ExtensionElementProvider<Item>
                 CharSequence payloadText = PacketParserUtils.parseElement(parser, true);
                 return new PayloadItem<SimplePayload>(id, node, new SimplePayload(payloadElemName, payloadNS, payloadText));
             }
-            else 
+            else
             {
                 return new PayloadItem<ExtensionElement>(id, node, extensionProvider.parse(parser));
             }