diff --git a/nbproject/project.properties b/nbproject/project.properties
index 25adfda..beb8a81 100644
--- a/nbproject/project.properties
+++ b/nbproject/project.properties
@@ -1,4 +1,4 @@
-#Sat, 25 Jul 2020 01:09:41 +0200
+#Sat, 25 Jul 2020 03:07:19 +0200
 annotation.processing.enabled=true
 annotation.processing.enabled.in.editor=false
 annotation.processing.processors.list=
diff --git a/src/opensesim/cli/Main.java b/src/opensesim/cli/Main.java
index b8646ed..c295d4a 100644
--- a/src/opensesim/cli/Main.java
+++ b/src/opensesim/cli/Main.java
@@ -25,12 +25,30 @@
  */
 package opensesim.cli;
 
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Scanner;
+import opensesim.world.GodWorld;
+import opensesim.world.World;
+
 /**
  *
  * @author tube
  */
 public class Main {
-    public static void main(String[] args){
-        
+
+    public static void main(String[] args) throws IOException {
+        System.out.println("OpenSeSim Cli");
+
+        InputStream is;
+        is = Main.class.getResourceAsStream(
+                "/opensesim/resources/files/example.json"
+        );
+
+        // We have to bootstrap with a god world because
+        // there whould be no way to to initialize the world
+        GodWorld godworld = new GodWorld(is);
+
+        System.out.println("finished");
     }
 }
diff --git a/src/opensesim/resources/files/example.json b/src/opensesim/resources/files/example.json
new file mode 100644
index 0000000..96477de
--- /dev/null
+++ b/src/opensesim/resources/files/example.json
@@ -0,0 +1,10 @@
+{
+    "version": 0.2,
+    "assets": [
+        {
+            "type": "opensesim.sesim.Assets.FurtureAsset",
+            "symbol": "MSFT",
+            "name": "Hello"
+        }
+    ]
+}
diff --git a/src/opensesim/world/GodWorld.java b/src/opensesim/world/GodWorld.java
index 8c59c0f..d15d7b2 100644
--- a/src/opensesim/world/GodWorld.java
+++ b/src/opensesim/world/GodWorld.java
@@ -25,6 +25,8 @@
  */
 package opensesim.world;
 
+import java.io.IOException;
+import java.io.InputStream;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 import java.util.Collection;
@@ -32,6 +34,7 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Random;
+import java.util.Scanner;
 import java.util.Set;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -74,8 +77,12 @@ public class GodWorld implements GetJson, World {
 
         public static final String ASSET_SYMBOL = "symbol";
         public static final String ASSET_TYPE = "type";
+        
+        public static final String VERSION = "version";
 
     }
+    
+    public static double VERSION = 0.2;
 
     /*   HashSet<AbstractAsset> assetsById = new HashSet<>();
     HashMap<String, AbstractAsset> assetsBySymbol = new HashMap<>();
@@ -91,7 +98,16 @@ public class GodWorld implements GetJson, World {
      */
     public GodWorld(JSONObject cfg) {
         init(cfg, false);
-
+    }
+    
+    public GodWorld(InputStream is) throws IOException{
+        String s = new Scanner(is, "UTF-8").useDelimiter("\\A").next(); 
+        JSONObject cfg = new JSONObject(s);
+        Double version = cfg.getDouble(GodWorld.JKEYS.VERSION);        
+        if (version != GodWorld.VERSION) {
+            throw new IOException("File has wrong version.");
+        }
+        init(cfg,false);
     }
 
     public Scheduler getScheduler() {
@@ -186,7 +202,7 @@ public class GodWorld implements GetJson, World {
             cls = (Class<AbstractAsset>) Class.forName(class_name);
             a = cls.getConstructor(GodWorld.class, JSONObject.class).newInstance(this, cfg);
         } catch (ClassNotFoundException | NoSuchMethodException | SecurityException | InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) {
-            Logger.getLogger(GodWorld.class.getName()).log(Level.SEVERE, null, ex);
+            Logger.getLogger(GodWorld.class.getName()).log(Level.SEVERE, class_name, ex);
             return null;
         }