doubt transactions between different objects java

I am trying to develop a small example of what I understood about object-oriented programming with JAVA, but I have a question, I have two objects: PROCESS AND REQUEST the procedure has a relation with request, I have a method in which it is called addTrite and another one that is called addRequest, in each one I use a prepareStatement. What I need is that when adding a new procedure a new request is added. I do not know how to treat the two transactions

I create an instance of the procedure:

Tramite nuevoTramite = newTramite();
nuevoTramite.agregarTramite();

and within the method addTramite I create an instance of the request so that the record is inserted in the database

class Tramite(){
public boolean agregarTramite(){
..
..
 PreparedStatement agregarNuevaSolicitud = 
 conection.prepareStatement(nuevaSolicitudQuery);
 agregarTramite.setTimestamp(1, Fecha.fechaActual());
..
..
    Solicitud nuevaSolicitud = new Solicitud();
    nuevaSolicitud.agregarNuevaSolicitud();
    conection.commit();
    stmt.close();
    conection.close();
..
..
}

but I think this is wrong, how can I use a commit for transactions that are in different classes, is that possible? I hope you can help me.

Thank you very much