class DBDeviceManager extends DBManager<Device> implements
        DeviceManager {

    @Override
    public final Set<Device> getDeviceList() throws DeviceManagerException {
        LOGGER.debug("getting device list");

        try {
            final List<Device> devices = super.getList(Device.class);
            return new HashSet<>(devices);
        } catch (DBManagerException e) {
            throw new DeviceManagerException(e);
        }
    }

    public  DBDeviceManager(final SessionFactory sessionFactory);

}