How to manipulate multiple banks with Hibernate?

An alternative found, in order to be able to use two banks, is to create two configuration files for hibernate and to manipulate them according to use:

hibernate-event.cfg.xml

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

<hibernate-configuration>
    <session-factory>

        <property name="connection.driver_class">com.mysql.cj.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost/event?useTimezone=true&amp;serverTimezone=UTC</property>
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="connection.pool_size">1</property>
        <property name="current_session_context_class">thread</property>
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
        <property name="show_sql">true</property>
        <property name="hbm2ddl.auto">update</property>

    <mapping class="org.hibernate.Event"/>

    </session-factory>
</hibernate-configuration>

hibernate-client.cfg.xml

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

<hibernate-configuration>
    <session-factory>

        <property name="connection.driver_class">com.mysql.cj.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost/client?useTimezone=true&amp;serverTimezone=UTC</property>
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="connection.pool_size">1</property>
        <property name="current_session_context_class">thread</property>
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
        <property name="show_sql">true</property>
        <property name="hbm2ddl.auto">update</property>

    <mapping class="org.hibernate.Client"/>

    </session-factory>
</hibernate-configuration>

In the utilities class, which handles the creation of Session , when the method is called, it receives the name of the file you want to manipulate and starts the connection according to the file you choose (the file from bank 1 or the bank file 2):

HibernateUtil.java

public class HibernateUtil {
    private static SessionFactory sessionFactory;

    private static SessionFactory buildSessionFactory(String configFile) {
        try{
            configFile += ".cfg.xml";
            return new Configuration().configure(configFile).buildSessionFactory();
        } catch (Throwable ex) {
            System.err.println("Initial SessionFactory creation factory failed. " + ex);
            throw  new ExceptionInInitializerError(ex);
        }
    }
}

And finally, in the class that manipulates the database data, for each specific method, it is necessary to pass the file of the bank that wants to work.

ManagerDatabase.java

Select all clients:

public List<Cliente> selectAllClients() {
    List<Cliente> result;
    try {
        session = HibernateUtil.getSessionFactory("hibernate-client").openSession();
        tx = session.beginTransaction();

        query = session.createQuery("FROM clients");

        result = query.list();

        tx.commit();
    } catch (HibernateException he) {
        System.out.println("Was found an error in execution!" + he.getCause());
        result = null;
        return result;
    } finally {
        closeSession();
    }
    return result;
}

Select all events:

public List<Cliente> selectAllEvents() {
    List<Cliente> result;
    try {
        session = HibernateUtil.getSessionFactory("hibernate-event").openSession();
        tx = session.beginTransaction();

        query = session.createQuery("FROM events");

        result = query.list();

        tx.commit();
    } catch (HibernateException he) {
        System.out.println("Was found an error in execution!" + he.getCause());
        result = null;
        return result;
    } finally {
        closeSession();
    }
    return result;
}