Hearings held under this subchapter are open to the public unless the court, on the motion of any of the parties or upon the court’s own motion, excludes the public. The court shall exclude the public from a hearing if the court determines that the possibility of damage or harm to the child outweighs the public’s interest in having an open hearing. Upon closing the hearing to the public, the court may admit those persons who have direct interest in the case or in the work of the court.