diff --git a/src/main/java/DavesClass.java b/src/main/java/DavesClass.java
new file mode 100644
index 0000000..6fe17dc
--- /dev/null
+++ b/src/main/java/DavesClass.java
@@ -0,0 +1,3 @@
+public class DavesClass {
+    static final String MESSAGE = "Here are the changes Dave made";
+}
diff --git a/src/main/java/JohnsClass.java b/src/main/java/JohnsClass.java
new file mode 100644
index 0000000..9c8ae54
--- /dev/null
+++ b/src/main/java/JohnsClass.java
@@ -0,0 +1,2 @@
+public class JohnsClass {
+}
diff --git a/src/main/java/Main.java b/src/main/java/Main.java
index b661a7f..ce617d1 100644
--- a/src/main/java/Main.java
+++ b/src/main/java/Main.java
@@ -2,5 +2,9 @@ public class Main {
     public static void main(String[] args) {
         System.out.println("This is Master branch in initial state");
         System.out.println("My branch has some additional data");
+        System.out.println("John added something valuable");
+        System.out.println("This is Dave's branch");
+        System.out.println("Dave did some good job here");
+        System.out.println("Master branch state changed substantially");
     }
 }