@Bean
	public JpaTransactionManager transactionManager() {
		JpaTransactionManager transactionManager = new JpaTransactionManager();
		transactionManager.setEntityManagerFactory(emf().getObject());
		transactionManager.setDataSource(dataSource());
		return transactionManager;
	}
Create the transactionManager.

@return {@link JpaTransactionManager}
ngrinder-controller/src/main/java/org/ngrinder/infra/config/DatabaseConfig.java