public List<RoomsType> listaRoomsTypes() {
   RoomsTypesDao dao = new RoomsTypesDao();
   try {
     return dao.findRoomsTypes();
   } catch (SQLException e) {
     JOptionPane.showMessageDialog(
         null, "Problemas ao localizar tipos de room" + e.getLocalizedMessage());
   }
   return null;
 }