Hibernate and Spring Configuration for Generic DAO example

AppConfiguration.java

package com.bytestree.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@ComponentScan(value={"com.bytestree"})
public class AppConfiguration {
}

HibernateConfig.java

package com.bytestree.config;

import java.util.Properties;
import javax.sql.DataSource;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.hibernate4.HibernateTransactionManager;
import org.springframework.orm.hibernate4.LocalSessionFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration
@EnableTransactionManagement
@PropertySource(value = { "classpath:application.properties" })
public class HibernateConfig {

	@Autowired
	private Environment env;

	/**
	 * Initialize dataSource 
	 * @return DataSource
	 */
	@Bean
	public DataSource getDataSource() {
		DriverManagerDataSource dataSource = new DriverManagerDataSource();
		dataSource.setDriverClassName(env.getRequiredProperty("datasource.driver"));
		dataSource.setUrl(env.getRequiredProperty("datasource.url"));
		dataSource.setUsername(env.getRequiredProperty("datasource.username"));
		dataSource.setPassword(env.getRequiredProperty("datasource.password"));
		return dataSource;
	}

	/**
	 * Initialize hibernate properties 
	 * @return Properties
	 */
	private Properties getHibernateProperties() {
		Properties properties = new Properties();
		properties.put("hibernate.dialect", env.getRequiredProperty("hibernate.dialect"));
		properties.put("hibernate.show_sql", env.getRequiredProperty("hibernate.show_sql"));
		properties.put("hibernate.jdbc.batch_size", env.getRequiredProperty("hibernate.batch.size"));
		return properties;
	}

	/**
	 * Initialize SessionFactory 
	 * @return LocalSessionFactoryBean
	 */
	@Bean
	public LocalSessionFactoryBean getSessionFactory() {
		LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
		sessionFactory.setDataSource(getDataSource());
		sessionFactory.setPackagesToScan(new String[] { "com.bytestree.model" });
		sessionFactory.setHibernateProperties(getHibernateProperties());
		return sessionFactory;
	}

	/**
	 * Initialize Transaction Manager 
	 * @param sessionFactory
	 * @return HibernateTransactionManager
	 */
	@Bean
	@Autowired
	public HibernateTransactionManager transactionManager(SessionFactory sessionFactory) {
		HibernateTransactionManager txManager = new HibernateTransactionManager();
		txManager.setSessionFactory(sessionFactory);
		return txManager;
	}
}