public List<ReservationDetail> getMonthReservationOfCategory(
     String instanceId, Date monthDate, String userId, String language, String idCategory) {
   Connection con = initCon();
   try {
     return ResourcesManagerDAO.getMonthReservationOfCategory(
         con, instanceId, monthDate, userId, language, idCategory);
   } catch (Exception e) {
     throw new ResourcesManagerRuntimeException(
         "ResourcesManagerBmEJB.getMonthReservationOfCategory()",
         SilverpeasRuntimeException.ERROR,
         "resourcesManager.EX_GET_MONTHLY_RESERVATIONS",
         e);
   } finally {
     fermerCon(con);
   }
 }