// Own namespace
namespace Org\Mxchange\City\Generic;
-// Import own stuff
+// Import application-specific stuff
use Org\Mxchange\City\Helper\CityHelper;
// Import framework stuff
* 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 BaseCitySystem extends BaseFrameworkSystem {
+abstract class BaseCitySystem extends BaseFrameworkSystem {
// Exception codes
const EXCEPTION_UNSUPPORTED_ERROR_HANDLER = 0x900;
const EXCEPTION_BASE64_ENCODING_NOT_MODULO_4 = 0x901;