I have not had experience with C. violacea. If I was in the same situation, I would place it on moss in an enclosure with elevated humidity, keep the moss slightly moist and place it in moderate light. I have a C. gigas (warscewiczii) that came bare root also. Three pseudobulbs and no roots. It took forever (8 months!) to push out a few 1" roots, once I did the moss treatment. Now it is just sitting there once again doing nothing!
You may know some of this info already
http://www.orchidworks.com/orchids/c...a/dale033c.htm
Keep us posted how you make out. Good luck with it.