I have committed this. Thanks, Hari!
done, removed the invalid comment
done. created javadoc.
Will update the patch shortly.
+1 patch looks good.
Please change initializeJournalStorage(..) private and the comment above to javadoc.
The patch looks good to me. Please remove the following comments in method formatStorage() sine they are irrelevant now: "For now, use the namespacedirs and edits dir to save the journal info..."