title: How can I generate DDL from existing entities with annotations using a maven plugin?
body: <p>I have maven project and I want to generate DDL from existing entities. </p>
  
  <p>How can I do that? </p>
  
  <p>Is there any maven plugin that I can generate the DDL?</p>
  
  <p>I am using JPA.(open jpa)</p>