@Override
    public void setNull(int intId, String strTabla, String strCampo) throws Exception {
        Statement oStatement;
        try {
            oStatement = (Statement) oConexionMySQL.createStatement();
            String strSQL = "UPDATE " + strTabla + " SET " + strCampo + " = null WHERE id = " + Integer.toString(intId);
            oStatement.executeUpdate(strSQL);
        } catch (SQLException e) {
            throw new Exception("mysql.setNull: Error al modificar el registro: " + e.getMessage());
        }
    }