title: Spring boot with spring @Transactional works without enabling transactional management
body: <p>In my spring boot application spring @Transactional annotation works without specifying @EnableTransactionManagement explicitly.</p>
  
  <p>Is there any official documentation saying that it is enabled automatically?</p>
  
  <p>Or there is something else happening .... ?</p>
  
  <p>btw: I'm using Spring Data JPA</p>