diff --git a/src/seedu/addressbook/commands/AddCommand.java b/src/seedu/addressbook/commands/AddCommand.java
index b0f202d42..dfd692e97 100644
--- a/src/seedu/addressbook/commands/AddCommand.java
+++ b/src/seedu/addressbook/commands/AddCommand.java
@@ -57,6 +57,11 @@ public ReadOnlyPerson getPerson() {
         return toAdd;
     }
 
+    @Override
+    public boolean isMutating() {
+        return true;
+    }
+
     @Override
     public CommandResult execute() {
         try {
diff --git a/src/seedu/addressbook/commands/ClearCommand.java b/src/seedu/addressbook/commands/ClearCommand.java
index 330146aaa..cb93824fd 100644
--- a/src/seedu/addressbook/commands/ClearCommand.java
+++ b/src/seedu/addressbook/commands/ClearCommand.java
@@ -11,6 +11,11 @@ public class ClearCommand extends Command {
 
     public static final String MESSAGE_SUCCESS = "Address book has been cleared!";
 
+    @Override
+    public boolean isMutating() {
+        return true;
+    }
+
     @Override
     public CommandResult execute() {
         addressBook.clear();
diff --git a/src/seedu/addressbook/commands/Command.java b/src/seedu/addressbook/commands/Command.java
index ccd4fcbf4..643d0539e 100644
--- a/src/seedu/addressbook/commands/Command.java
+++ b/src/seedu/addressbook/commands/Command.java
@@ -26,6 +26,12 @@ public Command(int targetIndex) {
     protected Command() {
     }
 
+    /**
+     * Checks whether the command type mutates the data
+     * @return true if the data is mutated, false otherwise
+     */
+    public abstract boolean isMutating();
+
     /**
      * Constructs a feedback message to summarise an operation that displayed a listing of persons.
      *
diff --git a/src/seedu/addressbook/commands/DeleteCommand.java b/src/seedu/addressbook/commands/DeleteCommand.java
index 1dd78f85e..7fc9adf43 100644
--- a/src/seedu/addressbook/commands/DeleteCommand.java
+++ b/src/seedu/addressbook/commands/DeleteCommand.java
@@ -24,6 +24,10 @@ public DeleteCommand(int targetVisibleIndex) {
         super(targetVisibleIndex);
     }
 
+    @Override
+    public boolean isMutating() {
+        return true;
+    }
 
     @Override
     public CommandResult execute() {
diff --git a/src/seedu/addressbook/commands/ExitCommand.java b/src/seedu/addressbook/commands/ExitCommand.java
index 0585451f1..c116a61f5 100644
--- a/src/seedu/addressbook/commands/ExitCommand.java
+++ b/src/seedu/addressbook/commands/ExitCommand.java
@@ -11,6 +11,11 @@ public class ExitCommand extends Command {
             + "Example: " + COMMAND_WORD;
     public static final String MESSAGE_EXIT_ACKNOWEDGEMENT = "Exiting Address Book as requested ...";
 
+    @Override
+    public boolean isMutating() {
+        return false;
+    }
+
     @Override
     public CommandResult execute() {
         return new CommandResult(MESSAGE_EXIT_ACKNOWEDGEMENT);
diff --git a/src/seedu/addressbook/commands/FindCommand.java b/src/seedu/addressbook/commands/FindCommand.java
index c8e9a380f..8251a1afd 100644
--- a/src/seedu/addressbook/commands/FindCommand.java
+++ b/src/seedu/addressbook/commands/FindCommand.java
@@ -30,6 +30,11 @@ public Set<String> getKeywords() {
         return new HashSet<>(keywords);
     }
 
+    @Override
+    public boolean isMutating() {
+        return false;
+    }
+
     @Override
     public CommandResult execute() {
         final List<ReadOnlyPerson> personsFound = getPersonsWithNameContainingAnyKeyword(keywords);
diff --git a/src/seedu/addressbook/commands/HelpCommand.java b/src/seedu/addressbook/commands/HelpCommand.java
index ef2ed7d0e..05fcf3072 100644
--- a/src/seedu/addressbook/commands/HelpCommand.java
+++ b/src/seedu/addressbook/commands/HelpCommand.java
@@ -21,6 +21,11 @@ public class HelpCommand extends Command {
             + "\n" + HelpCommand.MESSAGE_USAGE
             + "\n" + ExitCommand.MESSAGE_USAGE;
 
+    @Override
+    public boolean isMutating() {
+        return false;
+    }
+
     @Override
     public CommandResult execute() {
         return new CommandResult(MESSAGE_ALL_USAGES);
diff --git a/src/seedu/addressbook/commands/IncorrectCommand.java b/src/seedu/addressbook/commands/IncorrectCommand.java
index 81abba7a1..08cead05e 100644
--- a/src/seedu/addressbook/commands/IncorrectCommand.java
+++ b/src/seedu/addressbook/commands/IncorrectCommand.java
@@ -12,6 +12,11 @@ public IncorrectCommand(String feedbackToUser){
         this.feedbackToUser = feedbackToUser;
     }
 
+    @Override
+    public boolean isMutating() {
+        return false;
+    }
+
     @Override
     public CommandResult execute() {
         return new CommandResult(feedbackToUser);
diff --git a/src/seedu/addressbook/commands/ListCommand.java b/src/seedu/addressbook/commands/ListCommand.java
index cb604a8e9..fdc5b8f7d 100644
--- a/src/seedu/addressbook/commands/ListCommand.java
+++ b/src/seedu/addressbook/commands/ListCommand.java
@@ -16,6 +16,10 @@ public class ListCommand extends Command {
             + "Displays all persons in the address book as a list with index numbers.\n\t"
             + "Example: " + COMMAND_WORD;
 
+    @Override
+    public boolean isMutating() {
+        return false;
+    }
 
     @Override
     public CommandResult execute() {
diff --git a/src/seedu/addressbook/commands/ViewAllCommand.java b/src/seedu/addressbook/commands/ViewAllCommand.java
index ed2c16e83..2e2957784 100644
--- a/src/seedu/addressbook/commands/ViewAllCommand.java
+++ b/src/seedu/addressbook/commands/ViewAllCommand.java
@@ -24,6 +24,10 @@ public ViewAllCommand(int targetVisibleIndex) {
         super(targetVisibleIndex);
     }
 
+    @Override
+    public boolean isMutating() {
+        return false;
+    }
 
     @Override
     public CommandResult execute() {
diff --git a/src/seedu/addressbook/commands/ViewCommand.java b/src/seedu/addressbook/commands/ViewCommand.java
index 1058c4b52..9b67b0dc7 100644
--- a/src/seedu/addressbook/commands/ViewCommand.java
+++ b/src/seedu/addressbook/commands/ViewCommand.java
@@ -24,6 +24,10 @@ public ViewCommand(int targetVisibleIndex) {
         super(targetVisibleIndex);
     }
 
+    @Override
+    public boolean isMutating() {
+        return false;
+    }
 
     @Override
     public CommandResult execute() {
diff --git a/src/seedu/addressbook/data/person/Address.java b/src/seedu/addressbook/data/person/Address.java
index 8ac726444..03ec8d4ae 100644
--- a/src/seedu/addressbook/data/person/Address.java
+++ b/src/seedu/addressbook/data/person/Address.java
@@ -6,7 +6,7 @@
  * Represents a Person's address in the address book.
  * Guarantees: immutable; is valid as declared in {@link #isValidAddress(String)}
  */
-public class Address {
+public class Address implements Printable {
 
     public static final String EXAMPLE = "123, some street";
     public static final String MESSAGE_ADDRESS_CONSTRAINTS = "Person addresses can be in any format";
@@ -28,6 +28,16 @@ public Address(String address, boolean isPrivate) throws IllegalValueException {
         this.value = address;
     }
 
+    @Override
+    public String getPrintableString() {
+        if (isPrivate) {
+            return "Address: private";
+        } else {
+            return "Address: " + value;
+        }
+    }
+
+
     /**
      * Returns true if a given string is a valid person email.
      */
diff --git a/src/seedu/addressbook/data/person/Email.java b/src/seedu/addressbook/data/person/Email.java
index c946f1eb3..2ab6a0905 100644
--- a/src/seedu/addressbook/data/person/Email.java
+++ b/src/seedu/addressbook/data/person/Email.java
@@ -6,7 +6,7 @@
  * Represents a Person's email in the address book.
  * Guarantees: immutable; is valid as declared in {@link #isValidEmail(String)}
  */
-public class Email {
+public class Email implements Printable{
 
     public static final String EXAMPLE = "valid@e.mail";
     public static final String MESSAGE_EMAIL_CONSTRAINTS =
@@ -30,6 +30,16 @@ public Email(String email, boolean isPrivate) throws IllegalValueException {
         this.value = email;
     }
 
+    @Override
+    public String getPrintableString() {
+        if (isPrivate) {
+            return "Email: private";
+        } else {
+            return "Email: " + value;
+        }
+    }
+
+
     /**
      * Checks if a given string is a valid person email.
      */
diff --git a/src/seedu/addressbook/data/person/Name.java b/src/seedu/addressbook/data/person/Name.java
index 487b7ad9c..5028d0e5c 100644
--- a/src/seedu/addressbook/data/person/Name.java
+++ b/src/seedu/addressbook/data/person/Name.java
@@ -9,7 +9,7 @@
  * Represents a Person's name in the address book.
  * Guarantees: immutable; is valid as declared in {@link #isValidName(String)}
  */
-public class Name {
+public class Name implements Printable{
 
     public static final String EXAMPLE = "John Doe";
     public static final String MESSAGE_NAME_CONSTRAINTS = "Person names should be spaces or alphanumeric characters";
@@ -30,6 +30,12 @@ public Name(String name) throws IllegalValueException {
         this.fullName = name;
     }
 
+    @Override
+    public String getPrintableString() {
+        return "Name: " + fullName;
+    }
+
+
     /**
      * Returns true if a given string is a valid person name.
      */
diff --git a/src/seedu/addressbook/data/person/Person.java b/src/seedu/addressbook/data/person/Person.java
index cf6211841..af4985cec 100644
--- a/src/seedu/addressbook/data/person/Person.java
+++ b/src/seedu/addressbook/data/person/Person.java
@@ -34,6 +34,17 @@ public Person(ReadOnlyPerson source) {
         this(source.getName(), source.getPhone(), source.getEmail(), source.getAddress(), source.getTags());
     }
 
+    /**
+     * Returns a concatenated version of the printable strings of each object.
+     */
+    String getPrintableString(Printable... printables){
+        String returnString = "";
+        for (Printable p : printables) {
+            returnString += "  " + p;
+        }
+        return returnString;
+    }
+
     @Override
     public Name getName() {
         return name;
diff --git a/src/seedu/addressbook/data/person/Phone.java b/src/seedu/addressbook/data/person/Phone.java
index b5a556de4..234853ba9 100644
--- a/src/seedu/addressbook/data/person/Phone.java
+++ b/src/seedu/addressbook/data/person/Phone.java
@@ -6,7 +6,7 @@
  * Represents a Person's phone number in the address book.
  * Guarantees: immutable; is valid as declared in {@link #isValidPhone(String)}
  */
-public class Phone {
+public class Phone implements Printable {
 
     public static final String EXAMPLE = "123456789";
     public static final String MESSAGE_PHONE_CONSTRAINTS = "Person phone numbers should only contain numbers";
@@ -29,6 +29,15 @@ public Phone(String phone, boolean isPrivate) throws IllegalValueException {
         this.value = phone;
     }
 
+    @Override
+    public String getPrintableString() {
+        if (isPrivate) {
+            return "Phone: private";
+        } else {
+            return "Phone: " + value;
+        }
+    }
+
     /**
      * Checks if a given string is a valid person phone number.
      */
diff --git a/src/seedu/addressbook/data/person/Printable.java b/src/seedu/addressbook/data/person/Printable.java
new file mode 100644
index 000000000..b636e9936
--- /dev/null
+++ b/src/seedu/addressbook/data/person/Printable.java
@@ -0,0 +1,9 @@
+package seedu.addressbook.data.person;
+
+public interface Printable {
+
+    default String getPrintableString() {
+        return null;
+    }
+
+}
diff --git a/src/seedu/addressbook/logic/Logic.java b/src/seedu/addressbook/logic/Logic.java
index 17afd61a0..fe2bd529d 100644
--- a/src/seedu/addressbook/logic/Logic.java
+++ b/src/seedu/addressbook/logic/Logic.java
@@ -85,7 +85,9 @@ public CommandResult execute(String userCommandText) throws Exception {
     private CommandResult execute(Command command) throws Exception {
         command.setData(addressBook, lastShownList);
         CommandResult result = command.execute();
-        storage.save(addressBook);
+        if (command.isMutating()) {
+            storage.save(addressBook);
+        }
         return result;
     }