Main class in EJB module

package pl.edu.agh.soa;

import javax.ejb.Stateless;
import javax.jws.WebResult;
import javax.jws.WebService;
import javax.jws.WebMethod;
import javax.jws.WebParam;

//import org.jboss.ejb3.annotation.SecurityDomain;
//import org.jboss.ws.api.annotation.WebContext;
//import javax.annotation.security.DeclareRoles;
//import javax.annotation.security.RolesAllowed;

import java.util.ArrayList;

@Stateless
@WebService
//@SecurityDomain("domain1")
//@DeclareRoles("user3")
//@WebContext(
//        authMethod="BASIC",
//        transportGuarantee="NONE",
//        secureWSDLAccess=false)
public class Hello {

    ArrayList<String> subjects = new ArrayList<>();
    String name;
    String surname;

    @WebMethod
    //@RolesAllowed("user3")
    @WebResult(name="returned")
    public String
    listSubjects(@WebParam(name="filter") String filter) {
        ArrayList<String> filtered = new ArrayList<>();
        for(String elem : subjects) {
            if(elem.contains(filter)) {
                filtered.add(elem);
            }
        }
        return "Filtered out: " + filtered;
    }

    @WebMethod
    @WebResult(name="returned")
    public String
    addSubject(@WebParam(name="subj") String subj) {
        subjects.add(subj);
        return "After add: " + subjects;
    }

    @WebMethod
    public void
    editName(String name) {
        this.name = name;
    }

    @WebMethod
    public void
    editSurname(String surname) {
        this.surname = surname;
    }
}