public static List<EditLogFile> matchEditLogs(File logDir) throws IOException {
    return matchEditLogs(FileUtil.listFiles(logDir));
  }
@Test(expected = IOException.class)
  public void testMatchEditLogInvalidDirThrowsIOException() throws IOException {
    File badDir = new File("does not exist");
    FileJournalManager.matchEditLogs(badDir);
  }