San Diego Opera’s board of directors has voted to keep the company open and announced the 2015 season, denying an earlier decision brought up by the dismissed manager Ian D. Campbell. The 2015 season – the opera’s 50th – will include three fully staged operas, ‘La Bohème’, ‘Don Giovanni’ and ‘Nixon in China’. To celebrate the 50th anniversary, the opera plans to stage two gala concerts with a selection of arias, duets and choruses.