From d0d98ed33e742c0962ff657b79c66e5675df2015 Mon Sep 17 00:00:00 2001
From: Yoochard <yangyuqinghhh@gmail.com>
Date: Fri, 2 Mar 2018 14:46:16 +0800
Subject: [PATCH] Make Command#execute() method abstract

---
 src/seedu/addressbook/commands/Command.java | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/seedu/addressbook/commands/Command.java b/src/seedu/addressbook/commands/Command.java
index a54cbcb5b..8f3d26e42 100644
--- a/src/seedu/addressbook/commands/Command.java
+++ b/src/seedu/addressbook/commands/Command.java
@@ -38,10 +38,9 @@ public static String getMessageForPersonListShownSummary(List<? extends ReadOnly
 
     /**
      * Executes the command and returns the result.
+     * This is an abstract method, should override in subclasses.
      */
-    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();