For some reason, the Blackhawks seem to be stockpiling the roster with not-well-known defensemen that I've never heard of, and probably no one else has either. Today, by perusing Doug Janik's NHLPA.com page, we can now see that he is now a member of the Blackhawks and will be making $500,000 this season. Janik is a defenseman who has spent the last couple of seasons playing in a total of 136 games for the Tampa Bay Lightning. He has 15 career points and has a career plus/minus of -13.
This is another guy who shouldn't and likely will not play with the 'Hawks barring multiple injuries. Apparently they are just trying to get players who can fill the team out in Rockford.
UPDATE: The Hawks' official site now has the news of the signings of Aaron Johnson and Janik, as well as the announcement of Colin Fraser re-signing for 1 year.