class SimpleFileSystemProvider implements FileSystemProvider {

    @Override
    public void createDirectory(final Path dir,
                                final FileAttribute<?>... attrs)
            throws UnsupportedOperationException, FileAlreadyExistsException, IOException, SecurityException {
        checkNotNull("dir",
                     dir);
        final Path realDir = dir.toAbsolutePath();
        checkFileExistsThenThrow(realDir);
        realDir.toFile().mkdirs();
    }

    public  SimpleFileSystemProvider();
    protected  SimpleFileSystemProvider(final File[] roots,
                                       final OSType osType);

}