Fix LinkageUtils

BauSystem_Main/src/de/steamwar/bausystem/linkage/LinkageUtils.java

@@ -49,7 +49,8 @@ public class LinkageUtils {
             });
         } catch (IOException e) {
             Bukkit.shutdown();
-            return;
+        } catch (NullPointerException e) {
+            // Ignored
         }
     }