From f1f239d9711ca5eed578995e05c428db184f3a6a Mon Sep 17 00:00:00 2001
From: Jaron Chan <jaron.chan.jin.jia@gmail.com>
Date: Thu, 1 Mar 2018 21:10:20 +0800
Subject: [PATCH 1/3] [LO-Abstract] Updated Command#execute() to be an abstract
 method

---
 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();

From 69bd278dc8a2a900b5ba0c0e92ee8eef096188cb Mon Sep 17 00:00:00 2001
From: Jaron Chan <jaron.chan.jin.jia@gmail.com>
Date: Thu, 1 Mar 2018 21:23:21 +0800
Subject: [PATCH 2/3] Revert "[LO-Abstract] Updated Command#execute() to be an
 abstract method"

This reverts commit f1f239d9711ca5eed578995e05c428db184f3a6a.
---
 src/seedu/addressbook/commands/Command.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

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

From ff80347efc10168893adca758af0c6500c4eb360 Mon Sep 17 00:00:00 2001
From: Jaron Chan <jaron.chan.jin.jia@gmail.com>
Date: Thu, 1 Mar 2018 21:30:18 +0800
Subject: [PATCH 3/3] [LO-Abstract] Updated Command#execute() to be an abstract
 method

---
 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();