fsync directories as well as files

import java.io.File;

import java.io.IOException;

import java.io.RandomAccessFile;

import java.nio.channels.FileChannel;

import java.nio.file.StandardOpenOption;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

        return stored;

    }

    private void fsyncDirectory(File directory) {

        try {

            try (FileChannel file = FileChannel.open(directory.toPath(),

                    StandardOpenOption.READ)) {

                file.force(true);

            }

        } catch (IOException e) {

            Slog.e(TAG, "Error syncing directory: " + directory, e);

        }

    }

    private void writeFile(String name, byte[] hash) {

        synchronized (mFileWriteLock) {

            RandomAccessFile raf = null;

                    raf.write(hash, 0, hash.length);

                }

                raf.close();

                fsyncDirectory((new File(name)).getAbsoluteFile().getParentFile());

            } catch (IOException e) {

                Slog.e(TAG, "Error writing to file " + e);

            } finally {