case noVirusFound:
log.info("{} says file '{}' is clean: {}", SCANNER_NAME,
documentName, output);
return;
case virusFound:
throw new VirusDetectedException(SCANNER_NAME + " detected virus: "
+ output);
case someErrorOccurred:
default:
// This can happen if clamdscan is found, but the clamd service is
// not running.