Work done so far.

src/com/studentersamfundet/app/DataHandler.java

@@ -0,0 +1,29 @@
+package com.studentersamfundet.app;
+
+public class DataHandler {
+	Event events;
+
+	void insert(String id, String title, String description, String date, String location, String category) {
+		int intId = Integer.parseInt(id);
+		if (get(intId) != null)
+			return;
+		
+		Event e = new Event(intId, title, description, date, location, category);
+		
+		if (events == null)
+			events = e;
+		else {
+			Event tmp = events;
+			while (tmp.next != null)
+				tmp = tmp.next;
+			tmp.next = e;
+		}
+	}
+	
+	Event get(int id) {
+		Event e = events;
+		while (e != null && e.id != id)
+			e = e.next;
+		return e;
+	}
+}