import java.util.Iterator;
import java.util.List;
import org.mxchange.addressbook.client.AddressbookClient;
-import org.mxchange.addressbook.database.frontend.contact.AddressbookContactDatabaseFrontend;
-import org.mxchange.addressbook.database.frontend.contact.AddressbookContactFrontend;
import org.mxchange.addressbook.exceptions.ContactAlreadyAddedException;
import org.mxchange.jcore.client.Client;
import org.mxchange.jcore.contact.Contact;