// Own namespace
namespace Org\Mxchange\City\Manager;
-// Import own stuff
+// Import application-specific stuff
use Org\Mxchange\City\Generic\BaseCitySystem;
+// Import framework stuff
+use Org\Mxchange\CoreFramework\Registry\Registerable;
+
/**
* A general Manager class
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-class BaseManager extends BaseCitySystem implements Manageable, Registerable {
+abstract class BaseManager extends BaseCitySystem implements Manageable, Registerable {
/**
* Protected constructor
*