code: public void checkValueData(String propertyId, int orderNumber) throws ValueDataNotFoundException, IOException
     {
        File f = getFile(propertyId, orderNumber);
        if (!f.exists())
        {
           throw new ValueDataNotFoundException("Value data corresponding to property with [id=" + propertyId
              + ", ordernum=" + orderNumber + "] does not exist.");
        }
     }
docs: {@inheritDoc}