synchronized void removeConnection(int id){
  try {
    managementDbRemove.setInt(1,id);
    managementDbRemove.execute();
  }
 catch (  SQLException e) {
    DbException.traceThrowable(e);
  }
}

synchronized void removeConnection ( int id ) { try { managementDbRemove . setInt ( 1 , id ) ; managementDbRemove . execute ( ) ; } catch ( SQLException e ) { DbException . traceThrowable ( e ) ; } }
remove a connection from the management database .
