Testing around....

src/main/java/de/skate702/craftingkeys/config/GuiConfig.java

@@ -16,7 +16,6 @@ public class GuiConfig extends GuiScreen {
     public void initGui() {
 
         buttonList.add((new GuiButton(0, width / 2 - 58, height / 2 - 84, 19, 18, "Q")));
-
     }
 
     @Override

src/main/java/de/skate702/craftingkeys/config/GuiConfigHandler.java

@@ -20,3 +20,4 @@ public class GuiConfigHandler implements IGuiHandler {
         return null;
     }
 }
+