dont know if it works

src/main/java/rip/tilly/bedwars/commands/arena/ArenaCommand.java

@@ -139,7 +139,8 @@ public class ArenaCommand implements CommandExecutor {
                     new GenerateCommand().executeAs(sender, cmd, label, args);
 
                     break;
-
+                case "generator":
+                    new GeneratorCommand().executeAs(sender, cmd, label, args);
             }
         }