void makeIgnoreList(File dir) throws IOException {
		excludeFiles.clear();
		final File ignoreFilesFile = new File(dir, EXCLUDE_FILES_FILENAME);
		if (!ignoreFilesFile.exists()) {
			return;
		}
		try (BufferedReader is = new BufferedReader(new FileReader(ignoreFilesFile))) {
			String line;
			while ((line = is.readLine()) != null) {
				if (line.length() == 0 || line.startsWith("#")) {
					continue;
				}
				excludeFiles.add(line);
			}
		}
	}