diff --git a/src/main/java/cz/cvut/fel/sit/omo/foodchain/FoodChain.java b/src/main/java/cz/cvut/fel/sit/omo/foodchain/FoodChain.java
index d5e7717..a9085ad 100644
--- a/src/main/java/cz/cvut/fel/sit/omo/foodchain/FoodChain.java
+++ b/src/main/java/cz/cvut/fel/sit/omo/foodchain/FoodChain.java
@@ -22,18 +22,31 @@ public class FoodChain
 
     public static void main(String[] args)
     {
-        parseChannels();
-        parseNodes();
-        parseProducts();
-        parseScenarios();
+        if(args.length < 4)
+        {
+            parseChannels("conf/channels.xml");
+            parseNodes("conf/nodes.xml");
+            parseProducts("conf/products.xml");
+            parseScenarios("conf/scenarios.xml");
+        }
+        else
+        {
+            parseChannels(args[1]);
+            parseNodes(args[2]);
+            parseProducts(args[3]);
+            parseScenarios(args[4]);
+        }
 
-//        getFactoryManager().getPoolDatabaseInstance().getChannelPoolInstance().findAll().stream().forEach(ch -> System.out.println(ch.getProductType()));
-//        getFactoryManager().getPoolDatabaseInstance().getNodePoolInstance().findAll().stream().forEach(ch -> System.out.println(ch));
-//        getFactoryManager().getPoolDatabaseInstance().getProductPoolInstance().findAll().stream().forEach(ch -> System.out.println(ch.getProductType() + " " + ch.getName()));
-//        getFactoryManager().getPoolDatabaseInstance().getScenarioPoolInstance().findAll().stream().forEach(ch -> ch.getSteps().stream().forEach(s -> System.out.println(s)));
+        //        getFactoryManager().getPoolDatabaseInstance().getChannelPoolInstance().findAll().stream().forEach(ch -> System.out.println(ch.getProductType()));
+        //        getFactoryManager().getPoolDatabaseInstance().getNodePoolInstance().findAll().stream().forEach(ch -> System.out.println(ch));
+        //        getFactoryManager().getPoolDatabaseInstance().getProductPoolInstance().findAll().stream().forEach(ch -> System.out.println(ch.getProductType() + " " + ch.getName()));
+        //        getFactoryManager().getPoolDatabaseInstance().getScenarioPoolInstance().findAll().stream().forEach(ch -> ch.getSteps().stream().forEach(s -> System.out.println(s)));
 
         Ticker.start();
-        while (Ticker.getTimer().isRunning());
+        while (Ticker.getTimer().isRunning())
+        {
+            ;
+        }
     }
 
     public static FactoryManager getFactoryManager()
@@ -41,89 +54,61 @@ public class FoodChain
         return factoryManager;
     }
 
-    // todo maybe some refactoring needed?
-    //  add other entities
-    public static void parseChannels()
+    public static ParserResult parseDocument(String path, String rootElementTag)
     {
         try
         {
-            // parse channel configuration
-            ConfigurationParser.parseDocument("conf/channels.xml");
-            ParserResult parserResult = ConfigurationParser.getElements("channel");
-            List<ParserResultElement> elements = parserResult.getElements();
-            for (ParserResultElement el : elements)
-            {
-                ChannelBase res = getFactoryManager().getChannelFactoryInstance().makeChannel(el);
-                getFactoryManager().getPoolDatabaseInstance().getChannelPoolInstance().add(res);
-            }
-
+            ConfigurationParser.parseDocument(path);
         }
         catch (ParserConfigurationException | SAXException | IOException e)
         {
             System.err.println(e.getMessage());
         }
+
+        return ConfigurationParser.getElements(rootElementTag);
+    }
+
+    public static void parseChannels(String path)
+    {
+        ParserResult parserResult = parseDocument(path, "channel");
+        List<ParserResultElement> elements = parserResult.getElements();
+        for (ParserResultElement el : elements)
+        {
+            ChannelBase res = getFactoryManager().getChannelFactoryInstance().makeChannel(el);
+            getFactoryManager().getPoolDatabaseInstance().getChannelPoolInstance().add(res);
+        }
     }
 
-    public static void parseNodes()
+    public static void parseNodes(String path)
     {
-        try
+        ParserResult parserResult = parseDocument(path, "node");
+        List<ParserResultElement> elements = parserResult.getElements();
+        for (ParserResultElement el : elements)
         {
-            // parse channel configuration
-            ConfigurationParser.parseDocument("conf/nodes.xml");
-            ParserResult parserResult = ConfigurationParser.getElements("node");
-            List<ParserResultElement> elements = parserResult.getElements();
-            for (ParserResultElement el : elements)
-            {
-                NodeBase res = getFactoryManager().getNodeFactoryInstance().makeNode(el);
-                getFactoryManager().getPoolDatabaseInstance().getNodePoolInstance().add(res);
-            }
-
-        }
-        catch (ParserConfigurationException | SAXException | IOException e)
-        {
-            System.err.println(e.getMessage());
+            NodeBase res = getFactoryManager().getNodeFactoryInstance().makeNode(el);
+            getFactoryManager().getPoolDatabaseInstance().getNodePoolInstance().add(res);
         }
     }
 
-    public static void parseProducts()
+    public static void parseProducts(String path)
     {
-        try
+        ParserResult parserResult = parseDocument(path, "product");
+        List<ParserResultElement> elements = parserResult.getElements();
+        for (ParserResultElement el : elements)
         {
-            // parse channel configuration
-            ConfigurationParser.parseDocument("conf/products.xml");
-            ParserResult parserResult = ConfigurationParser.getElements("product");
-            List<ParserResultElement> elements = parserResult.getElements();
-            for (ParserResultElement el : elements)
-            {
-                Product res = getFactoryManager().getProductFactoryInstance().makeProduct(el);
-                getFactoryManager().getPoolDatabaseInstance().getProductPoolInstance().add(res);
-            }
-
-        }
-        catch (ParserConfigurationException | SAXException | IOException e)
-        {
-            System.err.println(e.getMessage());
+            Product res = getFactoryManager().getProductFactoryInstance().makeProduct(el);
+            getFactoryManager().getPoolDatabaseInstance().getProductPoolInstance().add(res);
         }
     }
 
-    public static void parseScenarios()
+    public static void parseScenarios(String path)
     {
-        try
+        ParserResult parserResult = parseDocument(path, "scenario");
+        List<ParserResultElement> elements = parserResult.getElements();
+        for (ParserResultElement el : elements)
         {
-            // parse channel configuration
-            ConfigurationParser.parseDocument("conf/scenarios.xml");
-            ParserResult parserResult = ConfigurationParser.getElements("scenario");
-            List<ParserResultElement> elements = parserResult.getElements();
-            for (ParserResultElement el : elements)
-            {
-                Scenario res = getFactoryManager().getScenarioFactoryInstance().makeScenario(el);
-                getFactoryManager().getPoolDatabaseInstance().getScenarioPoolInstance().add(res);
-            }
-
-        }
-        catch (ParserConfigurationException | SAXException | IOException e)
-        {
-            System.err.println(e.getMessage());
+            Scenario res = getFactoryManager().getScenarioFactoryInstance().makeScenario(el);
+            getFactoryManager().getPoolDatabaseInstance().getScenarioPoolInstance().add(res);
         }
     }
 }