* will be generated the IOException
*/
public String save(File f, TransactionChangesLog changesLog) throws IOException
{
// save data
ObjectWriterImpl out = new ObjectWriterImpl(PrivilegedFileHelper.fileOutputStream(f));
TransactionChangesLogWriter wr = new TransactionChangesLogWriter();
wr.write(out, changesLog);
out.flush();
out.close();
return f.getName();
}