Chemistry, Class: Gregory Campbell happy to see Shawn Thornton sticking around » Gregory Campbell, Shawn Thornton

Gregory Campbell and Shawn Thornton have played together since Campbell arrived in Boston. (AP)

Gregory Campbell and Shawn Thornton have played together since Campbell arrived in Boston. (AP)

A young fan celebrates behind Boston Bruins’ Gregory Campbell (11) and Shawn Thornton, right, after Campbell scored in the second period of an NHL hockey game against the Buffalo Sabres in Boston, Thursday, March 8, 2012. (AP Photo/Michael Dwyer)