The same day that the Diocese of Rockville Centre unveiled its compensation program on Monday for victims of clergy sexual abuse, Boston attorney Mitchell Garabedian stood outside the diocese's headquarters on North Park Avenue with one of his clients, asserting that the church, through the program, is "trying to put a positive spin on an evil situation." The man he is representing, Thomas McGarvey, was 16 when he alleges that a priest began sexually abusing him at St. Catherine of Sienna Church in Franklin Square.