@Test
    public void insertEmployee(){
        SessionFactoryImpl sessionFactory = (SessionFactoryImpl) factory.getCurrentSession().getSessionFactory();
        EventListenerRegistry registry = sessionFactory.getServiceRegistry().getService(EventListenerRegistry.class);

        PostInsertEventListener postinsertListener = new PostInsertEventListener() {
            @Override
            public void onPostInsert(PostInsertEvent postInsertEvent) {
                Audit audit = new Audit();
                audit.setId(1L);
                audit.setLog("Logged event");
                hibernateSession.persist(audit);
            }

            @Override
            public boolean requiresPostCommitHanding(EntityPersister entityPersister) {
                return false;
            }
        };
        registry.prependListeners(EventType.POST_INSERT, postinsertListener);

        Person person = new Person();
        person.setId(1L);
        person.setName("Foo Bar");

        hibernateSession.save(person);

        hibernateSession.flush();
    }

<hibernate-configuration>
    <session-factory>
        <property name="hibernate.connection.driver_class">org.hsqldb.jdbcDriver</property>
        <property name="hibernate.connection.url">jdbc:hsqldb:mem:testdb;shutdown=false</property>
        <property name="hibernate.connection.username">sa</property><!-- default username -->
        <property name="hibernate.connection.password"/><!-- default password -->
        <property name="hibernate.connection.pool_size">10</property>
        <property name="hibernate.connection.autocommit">true</property>
        <property name="hibernate.hbm2ddl.auto">create-drop</property><!-- creates the tables from the entites automatically -->
        <property name="show_sql">true</property>
        <property name="dialect">org.hibernate.dialect.HSQLDialect</property>
        <property name="hibernate.current_session_context_class">org.hibernate.context.internal.ThreadLocalSessionContext</property>

        <mapping class="cz.dmostek.test.domain.Person"/>
        <mapping class="cz.dmostek.test.domain.Audit"/>
    </session-factory>
</hibernate-configuration>