diff --git a/src/seedu/addressbook/commands/ClearCommand.java b/src/seedu/addressbook/commands/ClearCommand.java
index b09706013..330146aaa 100644
--- a/src/seedu/addressbook/commands/ClearCommand.java
+++ b/src/seedu/addressbook/commands/ClearCommand.java
@@ -11,9 +11,6 @@ public class ClearCommand extends Command {
 
     public static final String MESSAGE_SUCCESS = "Address book has been cleared!";
 
-    public ClearCommand() {}
-
-
     @Override
     public CommandResult execute() {
         addressBook.clear();
diff --git a/src/seedu/addressbook/commands/HelpCommand.java b/src/seedu/addressbook/commands/HelpCommand.java
index 82530440c..ef2ed7d0e 100644
--- a/src/seedu/addressbook/commands/HelpCommand.java
+++ b/src/seedu/addressbook/commands/HelpCommand.java
@@ -21,8 +21,6 @@ public class HelpCommand extends Command {
             + "\n" + HelpCommand.MESSAGE_USAGE
             + "\n" + ExitCommand.MESSAGE_USAGE;
 
-    public HelpCommand() {}
-
     @Override
     public CommandResult execute() {
         return new CommandResult(MESSAGE_ALL_USAGES);
diff --git a/src/seedu/addressbook/parser/Parser.java b/src/seedu/addressbook/parser/Parser.java
index 3a8305f28..58f4f7e6c 100644
--- a/src/seedu/addressbook/parser/Parser.java
+++ b/src/seedu/addressbook/parser/Parser.java
@@ -41,8 +41,6 @@ public static class ParseException extends Exception {
      */
     public static final Pattern BASIC_COMMAND_FORMAT = Pattern.compile("(?<commandWord>\\S+)(?<arguments>.*)");
 
-    public Parser() {}
-
     /**
      * Parses user input into command for execution.
      *
diff --git a/src/seedu/addressbook/storage/jaxb/AdaptedAddressBook.java b/src/seedu/addressbook/storage/jaxb/AdaptedAddressBook.java
index 1201d7a36..550f5cd56 100644
--- a/src/seedu/addressbook/storage/jaxb/AdaptedAddressBook.java
+++ b/src/seedu/addressbook/storage/jaxb/AdaptedAddressBook.java
@@ -24,11 +24,6 @@ public class AdaptedAddressBook {
     @XmlElement
     private List<AdaptedTag> tags = new ArrayList<>();
 
-    /**
-     * No-arg constructor for JAXB use.
-     */
-    public AdaptedAddressBook() {}
-
     /**
      * Converts a given AddressBook into this class for JAXB use.
      *
diff --git a/src/seedu/addressbook/storage/jaxb/AdaptedPerson.java b/src/seedu/addressbook/storage/jaxb/AdaptedPerson.java
index 73c0a6ef6..747f5853e 100644
--- a/src/seedu/addressbook/storage/jaxb/AdaptedPerson.java
+++ b/src/seedu/addressbook/storage/jaxb/AdaptedPerson.java
@@ -36,12 +36,6 @@ private static class AdaptedContactDetail {
     @XmlElement
     private List<AdaptedTag> tagged = new ArrayList<>();
 
-    /**
-     * No-arg constructor for JAXB use.
-     */
-    public AdaptedPerson() {}
-
-
     /**
      * Converts a given Person into this class for JAXB use.
      *
diff --git a/src/seedu/addressbook/storage/jaxb/AdaptedTag.java b/src/seedu/addressbook/storage/jaxb/AdaptedTag.java
index cd5286a36..e13c0c097 100644
--- a/src/seedu/addressbook/storage/jaxb/AdaptedTag.java
+++ b/src/seedu/addressbook/storage/jaxb/AdaptedTag.java
@@ -14,11 +14,6 @@ public class AdaptedTag {
     @XmlValue
     public String tagName;
 
-    /**
-     * No-arg constructor for JAXB use.
-     */
-    public AdaptedTag() {}
-
     /**
      * Converts a given Tag into this class for JAXB use.
      *