@After
  public void teardown() throws AmbariException, SQLException {
    m_injector.getInstance(UnitOfWork.class).end();
    H2DatabaseCleaner.clearDatabase(m_injector.getProvider(EntityManager.class).get());
    m_injector = null;
  }
Tests the management of {@link AlertEvent}s in the system.
ambari-server/src/test/java/org/apache/ambari/server/state/cluster/AlertDataManagerTest.java