assert (false);
logger.log( Level.WARNING, "Failed to construct URL for " + filename, e);  assert(false);
		private URL constructURL(String filename)		{			URL url = null;			try 			{				url = new URL("file", null, -1, new File(driverHomeDir, filename)						.getAbsolutePath());			} catch (MalformedURLException e) 			{				// TODO: log exception				//should not arrive here				assert (false);			}			return url;		}