simplify code

src/sample/Controller.java

@@ -12,12 +12,11 @@ public class Controller {
     @FXML
     private void handleSubmit() {
 
-        String tmp = textArea.getText();
-
-        Thought t = new Thought(tmp);
+        //create new thought, parameter from textArea
+        Thought t = new Thought(textArea.getText());
 
+        //get the thought manager and add the thought to the manager
         ThoughtManager tm = ThoughtManager.getInstance();
-
         tm.add(t);
 
     }