public static void addFolderToTar(TarArchiveOutputStream tarStream, String path) throws IOException {
		TarArchiveEntry archiveEntry = new TarArchiveEntry(path);
		archiveEntry.setMode(TarArchiveEntry.DEFAULT_DIR_MODE);
		tarStream.putArchiveEntry(archiveEntry);
		tarStream.closeArchiveEntry();
	}
Add a folder into tar.

@param tarStream TarArchive outputStream
@param path      path to append
@throws IOException thrown when having IO problem.
ngrinder-core/src/main/java/org/ngrinder/common/util/CompressionUtils.java