diff --git a/07/src/de/dis2017/Main.java b/07/src/de/dis2017/Main.java
index 2b2af12..57c52e1 100644
--- a/07/src/de/dis2017/Main.java
+++ b/07/src/de/dis2017/Main.java
@@ -25,18 +25,21 @@ public class Main {
      */
     public static void main(String[] args) {
         _orm = new ORM();
+        System.out.println("Begin Extract process..");
         extract();
         load();
     }
     
     private static void extract()
     {
+        System.out.println("Load product dimension data from database..");
         _articles = _orm.getArticles();
         Map<String, Integer> articleNames = new HashMap<>();
         for (Article article : _articles) {
             articleNames.put(article.get_name(), article.get_articleID());
         }
     
+        System.out.println("Load location dimension data from database..");
         _shops        = _orm.getShops();
         Map<String, Integer> shopNames    = new HashMap<>();
         for (Shop shop : _shops) {
@@ -44,8 +47,14 @@ public class Main {
         }
         
         try {
+            System.out.println("Scan the CSV file..");
             List<List<String>> csvEntries = CSVScanner.scan("sales.csv");
+            System.out.println("Finish Extract process");
             List<Sale>         sales      = new ArrayList<>();
+            System.out.println("Begin Transform process..");
+            System.out.println("Transform each CSV row into one Sale object..");
+            System.out.println("..and create one Date object for each date (multiple Sale objects share one such " +
+                               "object)..");
             for (List<String> row : csvEntries) {
                 Sale   sale    = new Sale();
                 String date    = row.get(0);
@@ -62,21 +71,29 @@ public class Main {
                 sales.add(sale);
             }
             _sales = sales;
+            System.out.println("Finish Transform process.");
         } catch (FileNotFoundException e) {
             e.printStackTrace();
         }
         
+        System.out.println("Retrieve all Date objects which were created during Transform");
         _dates = Date.getDates();
     }
     
     private static void load()
     {
+        System.out.println("Begin Load process..");
         _orm.setAutoCommit(false);
+        System.out.println("Write product dimension data to database..");
         _orm.createArticles(_articles);
+        System.out.println("Write date dimension data to database..");
         _orm.createDates(_dates);
+        System.out.println("Write location dimension data to database..");
         _orm.createShops(_shops);
+        System.out.println("Write sales (fact) data to database..");
         _orm.createSales(_sales);
         _orm.commit();
         _orm.setAutoCommit(true);
+        System.out.println("Finish Load process");
     }
 }