PORTLAND, Maine — The University of Massachusetts Lowell entered Saturday’s Hockey East game against the University of Maine at the Cross Insurance Arena in Portland as one of the best defensive teams in the country. The visitors lived up to that reputation. Senior goalie Owen Savory, who came into the game with the nation’s second-lowest goals-against average, made 29 saves and the River Hawks received a first-period goal from junior left wing Blake Wells and a late third-period goal from junior right wing Ryan Brushett to blank the Black Bears 2-0 in front of a sizeable crowd. UMass Lowell, ranked 15th in the country, improved to 8-2-2 overall and 6-1 in Hockey East while UMaine fell to 1-10-2 and 1-7-1. Victor Ostman made 24 saves for the Black Bears. The game was stopped with 4:01 left in the second period when Nolan Renwick applied a hit to a River Hawk and it popped out a pane of glass.