diff --git a/src/main/java/com/rookout/tutorial/TodoController.java b/src/main/java/com/rookout/tutorial/TodoController.java
index 9925096..4648249 100644
--- a/src/main/java/com/rookout/tutorial/TodoController.java
+++ b/src/main/java/com/rookout/tutorial/TodoController.java
@@ -12,6 +12,7 @@
 public class TodoController {
     private static final Logger logger = LoggerFactory.getLogger(TodoController.class);
     private TodoStorage todos = TodoStorage.getInstance();
+    private TodoExtraClass extraClass = TodoExtraClass.getInstance();
 
     @RequestMapping(value = "/todos", method = RequestMethod.GET)
     public TodoRecord[] getTodos() {
diff --git a/src/main/java/com/rookout/tutorial/TodoExtraClass.java b/src/main/java/com/rookout/tutorial/TodoExtraClass.java
new file mode 100644
index 0000000..8366d05
--- /dev/null
+++ b/src/main/java/com/rookout/tutorial/TodoExtraClass.java
@@ -0,0 +1,22 @@
+package com.rookout.tutorial;
+
+/**
+ * Tdo Storage (in memory list that implements Interface TodoRecord Storage).
+ */
+public class TodoExtraClass {
+    private int count;
+
+    private static TodoExtraClass instance = new TodoExtraClass();
+
+    public static TodoExtraClass getInstance() {
+        return instance;
+    }
+
+    private TodoExtraClass() {
+        this.count = 1;
+    }
+
+    public int getCount() {
+        return this.count;
+    }
+}