The principal at Waterbury’s Bunker Hill Elementary School has been placed on paid leave following his arrest on disorderly conduct charges. The Waterbury Republican-American reported that Brian Goggin, 55, was taken into custody early Monday morning after police said he tried to enter a downtown bar after closing time. Goggin, who earns more than $112,000, declined to comment Wednesday. The arrest was Goggin’s second in three years. He was on paid leave for more than three months in 2010 after being charged with drunken driving.