Only output a Data update message if something has changed.

EssentialsGroupManager/src/Changelog.txt

@@ -183,4 +183,5 @@ v 2.0:
 	- Re-initialize the WorldsHolder on a reload, as un-registering and re-registering a new holder means all plugins have to check for the new service on every quiery.
 	- Prevent null perms getting past the GlobalGroups loader.
 	- Fix forgetting sub groups on a manload.
-	- Allow 'manucheckp' to notify when superperms reports false but it is really negated.
+	- Allow 'manucheckp' to notify when superperms reports false but it is really negated.
+	- Only output a Data update message if something has changed.

EssentialsGroupManager/src/org/anjocaido/groupmanager/GroupManager.java

@@ -324,8 +324,8 @@ public class GroupManager extends JavaPlugin {
 				public void run() {
 
 					try {
-						worldsHolder.saveChanges(false);
-						GroupManager.logger.log(Level.INFO, " Data files refreshed.");
+						if (worldsHolder.saveChanges(false))
+							GroupManager.logger.log(Level.INFO, " Data files refreshed.");
 					} catch (IllegalStateException ex) {
 						GroupManager.logger.log(Level.WARNING, ex.getMessage());
 					}

EssentialsGroupManager/src/org/anjocaido/groupmanager/dataholder/worlds/WorldsHolder.java

@@ -264,8 +264,9 @@ public class WorldsHolder {
 	/**
      *
      */
-	public void saveChanges(boolean overwrite) {
+	public boolean saveChanges(boolean overwrite) {
 
+		boolean changed = false;
 		ArrayList<WorldDataHolder> alreadyDone = new ArrayList<WorldDataHolder>();
 		Tasks.removeOldFiles(plugin, plugin.getBackupFolder());
 
@@ -294,6 +295,7 @@ public class WorldsHolder {
 						backupFile(w, true);
 
 						WorldDataHolder.writeGroups(w, w.getGroupsFile());
+						changed = true;
 						//w.removeGroupsChangedFlag();
 					} else {
 						// Newer file found.
@@ -307,6 +309,7 @@ public class WorldsHolder {
 						// Backup Groups file
 						backupFile(w, true);
 						w.reloadGroups();
+						changed = true;
 					}
 				}
 			if (!mirrorsUser.containsKey(w.getName().toLowerCase()))
@@ -316,6 +319,7 @@ public class WorldsHolder {
 						backupFile(w, false);
 
 						WorldDataHolder.writeUsers(w, w.getUsersFile());
+						changed = true;
 						//w.removeUsersChangedFlag();
 					} else {
 						// Newer file found.
@@ -329,10 +333,12 @@ public class WorldsHolder {
 						// Backup Users file
 						backupFile(w, false);
 						w.reloadUsers();
+						changed = true;
 					}
 				}
 			alreadyDone.add(w);
 		}
+		return changed;
 	}
 
 	/**