Yeah...whatever

gistfile1.txt

public class Manager {

private Map<String, Boolean> yourmap = new HashMap<String, Boolean>();

// Some dummy function.
public void addToMap(String str, Boolean bool) {
  yourmap.put(str, bool);
}

}

public class Listener {

private Manager varmanager; // This part.

// This part is important.
public Listener(Manager inst) {
manager = inst;
}

@EventHandler
public void onPlayerLogin(PlayerLoginEvent e) {
varmanager.addToMap(e.getPlayer().getName(), true); // See how varmanager is referenced instead of the class?
}

}