Add fileSuffix .recording

FightSystem_Main/src/de/steamwar/fightsystem/record/FileRecorder.java

@@ -35,7 +35,7 @@ public class FileRecorder extends Recorder {
 
     public FileRecorder(){
         super();
-        File file = new File(FightSystem.getPlugin().getDataFolder(), "recording");
+        File file = new File(FightSystem.getPlugin().getDataFolder(), "recording.recording");
         try{
             file.createNewFile();
             outputStream = new DataOutputStream(new GZIPOutputStream(new FileOutputStream(file), 4096));