Merge branch 'setup' into 'master'

persistence

See merge request reswp-2020/galaxytrucker!3

Server/src/Persistence/DAO.java

+package Persistence;
+
+public abstract class DAO<T> {
+
+    public abstract void persist(T object);
+
+    public abstract void update(T object);
+
+    public abstract void remove(T object);
+}