package ru.ulstu.activity.common.model; import ru.ulstu.activity.timeline.model.Event; import ru.ulstu.core.model.BaseEntity; import ru.ulstu.user.model.User; import java.util.List; import java.util.Set; public abstract class AbstractActivity extends BaseEntity { private String title; public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public abstract Set getActivityMembers(); public abstract List getEvents(); }