code: @Override
      public void onDisable() {
          if (getStorageHandler() != null) {
              getLogger().info(getLanguageManager().getString("closing_db_link"));
              getStorageHandler().disable();
          }
          // Managers
          accountManager = null;
          config = null;
          currencyManager = null;
          storageHandler = null;
          eventManager = null;
          languageManager = null;
          worldGroupManager = null;
          commandManager = null;
          databaseInitialized = false;
          currencyInitialized = false;
          initialized = false;
          metrics = null;
          mainConfig = null;
          updater = null;
          //Default values
          displayFormat = null;
          holdings = 0.0;
          bankPrice = 0.0;
      }
docs: Disable the plugin.