public void addObject(Entity object) throws InputOutputDataException {
        try {
            session = HibernateUtil.getSessionFactory().openSession();
            transaction = session.beginTransaction();
            session.save(object);
            transaction.commit();
        } catch (Exception e) {
            if (transaction != null)
                transaction.rollback();
            throw new InputOutputDataException(InputOutputDataException.ERROR_WRITE_IN_DATABASE);
        } finally {
            closeSession(session);
        }
    }

    public void updateObject(Entity object) throws InputOutputDataException {
        try {
            session = HibernateUtil.getSessionFactory().openSession();
            transaction = session.beginTransaction();
            session.update(object);
            transaction.commit();
        } catch (Exception e) {
            if (transaction != null)
                transaction.rollback();
            throw new InputOutputDataException(InputOutputDataException.ERROR_WRITE_IN_DATABASE);
        } finally {
            closeSession(session);
        }
    }

    public void removeObject(Entity object) throws InputOutputDataException {
        try {
            session = HibernateUtil.getSessionFactory().openSession();
            transaction = session.beginTransaction();
            session.delete(object);
            transaction.commit();
        } catch (Exception e) {
            if (transaction != null)
                transaction.rollback();
            throw new InputOutputDataException("Failed to delete the object from the database.");
        } finally {
            closeSession(session);
        }
    }