Initial commit :)

Group.java

+import java.util.ArrayList;
+
+public class Group {
+
+    int groupID;
+    ArrayList<User> users;
+}

User.java

+import java.util.ArrayList;
+
+/*
+    Represents a single User of the app.
+ */
+
+public class User {
+
+    String userName;
+    String password;
+    String screenName;
+    ArrayList<Group> groups;
+}