Revert "Removed needless stump"

This reverts commit 124d06a6bc.

src/main/java/de/rwu/easydrop/service/processing/OrderManager.java

@@ -0,0 +1,10 @@
+package de.rwu.easydrop.service.processing;
+
+/**
+ * Processes dropshipping orders.
+ *
+ * TODO implement
+ */
+public class OrderManager {
+
+}