code: public <V> V executeTransaction(final DatabaseCallable<V> callable) throws SQLException {
  		return executeTransaction(
  			RuntimeException.class,
  			new DatabaseCallableE<V,RuntimeException>() {
  				@Override
  				public V call(DatabaseConnection db) throws SQLException {
  					return callable.call(db);
  				}
  			}
  		);
  	}
docs: @see  #executeTransaction(com.aoindustries.sql.DatabaseCallableE)
  
  @see #isInTransaction()