ATLANTA — LeBron James scored 31 points, while J.R. Smith made eight 3-pointers and added 28 to lead the Cleveland Cavaliers past the top-seeded Atlanta Hawks 97-89 in Game 1 of the Eastern Conference finals Wednesday night. Intent on bringing Cleveland its first NBA title, James sealed the victory with a soaring dunk in the final minute. But Smith was the one who ignited the Cavaliers, going 8 of 12 from 3-point range.