Improve logging of database errors - java.sql.BatchUpdateException: Batch entry 0 ... was aborted. Call getNextException to see the cause.

Caused by: java.sql.BatchUpdateException: Batch entry 0 delete from cru_comment where cru_comment_id=3112 was aborted.  Call getNextException to see the cause.
	at org.postgresql.jdbc2.AbstractJdbc2Statement$BatchResultHandler.handleError(AbstractJdbc2Statement.java:2537)
	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1328)
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:351)
	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2674)
	at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723)
	at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70)
	at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268)
	... 137 more