Resolving NPE

ws/Docbook/Id2topic/src/main/java/de/hdm_stuttgart/mi/bb/ModifyNodebbTopic.java

@@ -49,15 +49,12 @@ class ModifyNodebbTopic {
      * @return If a topic carrying the hdmId value exists, return its tid, else return a negative value.
      */
     int hdmIdExists(final String hdmId) {
-        return existingHdmIds.get(hdmId);
-         /*
-        final Document res = objectCollection.find(eq("hdmId", hdmId)).first();
-        if (null == res) {
+        final Integer tid = existingHdmIds.get(hdmId);
+        if (null == tid) {
             return -1;
         } else {
-            return res.getInteger(tidAttrib);
+            return tid;
         }
-        */
     }
 
     /**