From cb12ebfdc1133337f53cd32bede2d68f8afdf32f Mon Sep 17 00:00:00 2001
From: Qiu Haohao <qiuh0008@e.ntu.edu.sg>
Date: Wed, 7 Mar 2018 12:21:52 +0800
Subject: [PATCH] Make execute() method Abstract

---
 src/seedu/addressbook/commands/Command.java | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/seedu/addressbook/commands/Command.java b/src/seedu/addressbook/commands/Command.java
index a54cbcb5b..e61829364 100644
--- a/src/seedu/addressbook/commands/Command.java
+++ b/src/seedu/addressbook/commands/Command.java
@@ -39,9 +39,7 @@ public static String getMessageForPersonListShownSummary(List<? extends ReadOnly
     /**
      * Executes the command and returns the result.
      */
-    public CommandResult execute(){
-        throw new UnsupportedOperationException("This method should be implement in child classes");
-    }
+    public abstract CommandResult execute();
 
     //Note: it is better to make the execute() method abstract, by replacing the above method with the line below:
     //public abstract CommandResult execute();