added missing functionality

src/main/java/com/bib/essensbestellungsverwaltung/FoodMgr.java

@@ -1,4 +1,7 @@
 package com.bib.essensbestellungsverwaltung;
+/*
+    @author Malte Schulze Hobeling
+ */
 
 import java.util.List;
 
@@ -43,4 +46,9 @@ public class FoodMgr {
     public static List<String> getFoodById(long id){
         return Database.getEntryById("food",id);
     }
+
+    public static long createFood_selection(String[] food_selectionData){
+        String[] food_selectionH = {"childid","foodplanid","foodid"};
+        return Database.insert("food_selection",food_selectionH,food_selectionData);
+    }
 }