code: public void setDriverManager(CmsDriverManager driverManager) {
  
          m_driverManager = driverManager;
          CmsDbContext dbc = m_dbContextFactory.getDbContext();
          try {
              m_adminUserId = m_driverManager.readUser(dbc, OpenCms.getDefaultUsers().getUserAdmin()).getId();
          } catch (CmsException e) {
              dbc.rollback();
              LOG.error(e.getLocalizedMessage(), e);
          } finally {
              dbc.clear();
          }
      }
docs: Sets the driver manager instance.<p>
  
  @param driverManager the driver manager instance