+ * </p>
+ *
+ * <a name="db-user-transaction">
+ * <h2>Controlling transactions through a <code>UserTransaction</h2>
+ * </a>
+ *
+ * <p>
+ * It is also possible to manage JPA transaction through a <code>UserTransaction</code>.
+ * This is mostly useful if you are test software that uses <code>UserTransaction</code> for
+ * managing transactions, or if you want to manage multiple transactional resources.
+ * See the explanation at {@link org.wamblee.test.transactions.SimpleTransactionManager} for more details.
+ * </p>