title: Any API available for LiquiBase
body: <p>There is a requirement about a user interface to provide options to upgrade database change if there is new service pack for current Spring web application(with OpenJPA).</p>
  
  <p>Seems LiquiBase is a good option. But I haven't found any articles or document about LiquiBase API that can detect new schema change(either from database or change log). It looks like LiquiBase is more a "silence upgrade" option on development level, so each time developer can create new change log and let Maven to auto upgrade database schema. </p>
  
  <p>But is there any option we can provide front end user to click a button to upgrade the schema by their choice, then show user error when it fails and roll back? In general is there some Java API can wrap with Spring framework?</p>
  
  <p>Thanks in advance.</p>