<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.0.6.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>5.0.6.Final</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
  "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
  "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
  <session-factory>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>

    <property name="hibernate.connection.url">jdbc:mysql://localhost/testprojectdatabase</property>
    <property name="hibernate.connection.username">username_here</property>
    <property name="hibernate.connection.password">password_here</property>

    <property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
    <property name="hibernate.c3p0.min_size">5</property>
    <property name="hibernate.c3p0.max_size">20</property>
    <property name="hibernate.c3p0.timeout">300</property>
    <property name="hibernate.c3p0.max_statements">50</property>

    <mapping resource="milkiv/mytestproject/models/UserInfo.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

public class UserInfoManager implements ManagerAdd<UserInfo> {
    private final SessionFactory factory;

    public UserInfoManager() {
    factory = new Configuration().configure("hibernate.cfg.xml").buildSessionFactory();
    }

    public int add(UserInfo user) {
    Transaction transaction = null;
    Integer userId = null;
    try (Session session = factory.openSession()){
        transaction = session.beginTransaction();
        userId = (Integer) session.save(user);
        transaction.commit();
    } catch (HibernateException he) {
        if (transaction != null) {
        transaction.rollback();
        }
    }
    return userId;
    }
}

<mapping resource="/milkiv/mytestproject/models/UserInfo.hbm.xml"/>

<mapping resource="UserInfo.hbm.xml"/>

public UserInfoManager() {
        System.out.println(UserInfoManager.class
                .getResource("/milkiv/mytestproject/models/UserInfo.hbm.xml"));

        System.out.println(ClassLoader.getSystemClassLoader().getResource(
                "milkiv/mytestproject/models/UserInfo.hbm.xml"));
}

new UserInfoManager();