Trouble loading from XML file

I have a major problem. We can call this application "boat club system" and its a assignment in a UML course. But the problem that is really bothering me is that i can't load the "Member" Objects back to the Arraylist that is used when Exporting and Importing the objects.

I got some help with this by a friend, but the Importing won't work. This is the Error i get when trying to import.

Exception in thread "main" java.lang.NullPointerException
at boat.Controller.SystemController.readFromSystem(SystemController.java:288)
at boat.Controller.SystemController.<init>(SystemController.java:26)
at boat.View.Console.<init>(Console.java:17)
at BoatMain.main(BoatMain.java:22)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)

The problem is pointed on this specific line:

member.setMemberId(Integer.parseInt(element.get(i).getAttribute("memberId").getValue()));

The link to the whole application. http://ift.tt/1s56EjX

The System controller class looks like this. BTW, i am thinking of splitting up this class to more like System controller and Member controller for a more High Cohesion/Low coupling design. But only when i get the Import working correctly..

I don't know why it doesn't work. The member id is a INTEGER at first, but when exported its converted to a String. When imported it converted to a Int again. So I'm wondering if its something wrong there..

Would really appreciate help so i could continue. System Controller

public void readFromSystem () {

    File file = null;
    Builder builder = null;
    Document doc = null;

    try {

        file = new File(filePath);
        builder = new Builder();
        doc = builder.build(file);

        Element root = doc.getRootElement();

        Elements members = root.getChildElements();


        for (int i = 0; i < members.size(); i++) {

            Elements element = members.get(i).getChildElements();
            Member member = new Member();

            member.setMemberId(Integer.parseInt(element.get(i).getAttribute("memberId").getValue()));
            member.setPersonId(element.get(0).getValue());
            member.setName(element.get(1).getValue());

            memberList.add(member);

            if (members.get(i).getChildElements().size() == 3) {

                Elements boats = element.get(2).getChildElements();

                for (int j = 0; j < boats.size(); j++) {

                    Boat b = new Boat();

                    b.setBoatId(Integer.parseInt(boats.get(j).getAttribute("boatId").getValue()));
                    b.setBoatType(Integer.parseInt(boats.get(j).getChildElements().get(1).getValue()));
                    b.setBoatLength(boats.get(j).getChildElements().get(2).getValue());

                }
            }
        }
    } catch (IOException e) {
        System.out.print("Could not read from the system");
    } catch (nu.xom.ParsingException e) {
        System.out.print("Parsing was unsuccessful!");
    } 
}