Fix all checkstyle problems

src/main/java/duke/Converter.java

@@ -1,6 +1,6 @@
 package duke;
 
-import duke_exceptions.IllegalTaskTypeException;
+import duke.exceptions.IllegalTaskTypeException;
 
 import java.time.LocalDate;
 import java.time.format.DateTimeFormatter;
@@ -42,6 +42,9 @@ public static String by(String s) {
 
     /**
      * Returns a Task object specified by the input string.
+     * Since this method is ensured to be called properly
+     * (by implementation in class Parser),
+     * it will not invoke exception thrown and terminate the program.
      *
      * @param s input message string
      * @return a Task object

src/main/java/duke/Deadline.java

@@ -5,6 +5,7 @@
  * A <code>Deadline</code> object corresponds to
  * a task associated a date as deadline
  */
+
 public class Deadline extends Task {
     /** Constructor.
      *  Initialises message.

src/main/java/duke/DialogBox.java

@@ -9,12 +9,19 @@
 import javafx.scene.shape.Circle;
 import javafx.scene.text.Font;
 
+@SuppressWarnings("CheckStyle")
 public class DialogBox extends HBox {
     @SuppressWarnings("CanBeFinal")
-    protected Label text;
+    // The label containing text to be added in DialogBox.
+    private Label text;
 
-    public DialogBox(Label l, Circle c) {
-        text = l;
+    /** Constructor for DialogBox.
+     *
+     * @param label label containing text
+     * @param circle circle-shaped image
+     */
+    public DialogBox(Label label, Circle circle) {
+        text = label;
 
         @SuppressWarnings("SpellCheckingInspection")
         Font font = new Font("Baskerville", 14);
@@ -25,16 +32,25 @@ public DialogBox(Label l, Circle c) {
         text.setWrapText(true);
 
         this.setAlignment(Pos.TOP_RIGHT);
-        this.getChildren().addAll(text, c);
+        this.getChildren().addAll(text, circle);
     }
 
     /**
-     * Flips the dialog box such that the ImageView is on the left and text on the right.
+     * Flips the dialog box such that the ImageView is on the left and
+     * text on the right.
      */
     protected void flip() {
         this.setAlignment(Pos.TOP_LEFT);
-        ObservableList<Node> tmp = FXCollections.observableArrayList(this.getChildren());
+        ObservableList<Node> tmp = FXCollections
+                .observableArrayList(this.getChildren());
         FXCollections.reverse(tmp);
         this.getChildren().setAll(tmp);
     }
+
+    /**
+     * Returns the label instance named text;
+     */
+    protected Label getText() {
+        return text;
+    }
 }

src/main/java/duke/DialogBoxDuke.java

@@ -9,17 +9,29 @@
 import javafx.scene.shape.Circle;
 
 public class DialogBoxDuke extends DialogBox {
-    public DialogBoxDuke(Label l, Circle c) {
-        super(l, c);
-        Color color = Color.rgb(238,160,178);
+    /** Constructor for DialogBoxDuke.
+     *
+     * @param label label containing text
+     * @param circle circle-shaped image
+     */
+    public DialogBoxDuke(Label label, Circle circle) {
+        super(label, circle);
+        Color color = Color.rgb(238, 160, 178);
         CornerRadii corn = new CornerRadii(10);
-        Insets insets = new Insets(-2,0,-2,3);
-        Background background = new Background(new BackgroundFill(color, corn, insets));
-        text.setBackground(background);
+        Insets insets = new Insets(-2, 0, -2, 3);
+        Background background = new Background(
+                new BackgroundFill(color, corn, insets));
+        getText().setBackground(background);
     }
 
-    public static DialogBox getDukeDialog(Label l, Circle c) {
-        DialogBoxDuke db = new DialogBoxDuke(l, c);
+    /** Creates a new Duke DialogBox.
+     *
+     * @param label label containing text
+     * @param circle circle-shaped image
+     * @return a Duke DialogBox
+     */
+    public static DialogBox getDukeDialog(Label label, Circle circle) {
+        DialogBoxDuke db = new DialogBoxDuke(label, circle);
         db.flip();
         return db;
     }

src/main/java/duke/DialogBoxUser.java

@@ -10,16 +10,28 @@
 
 public class DialogBoxUser extends DialogBox {
 
-    public DialogBoxUser(Label l, Circle c) {
-        super(l, c);
-        Color col = Color.rgb(190,231,223);
+    /** Constructor for DialogBoxDuke.
+     *
+     * @param label label containing text
+     * @param circle circle-shaped image
+     */
+    public DialogBoxUser(Label label, Circle circle) {
+        super(label, circle);
+        Color col = Color.rgb(190, 231, 223);
         CornerRadii corn = new CornerRadii(10);
-        Insets insets = new Insets(-2,1,-2,0);
-        Background background = new Background(new BackgroundFill(col, corn, insets));
-        text.setBackground(background);
+        Insets insets = new Insets(-2, 1, -2, 0);
+        Background background = new Background(
+                new BackgroundFill(col, corn, insets));
+        getText().setBackground(background);
     }
 
-    public static DialogBox getUserDialog(Label l, Circle c) {
-        return new DialogBoxUser(l, c);
+    /** Creates a new User DialogBox.
+     *
+     * @param label label containing text
+     * @param circle circle-shaped image
+     * @return a User DialogBox
+     */
+    public static DialogBox getUserDialog(Label label, Circle circle) {
+        return new DialogBoxUser(label, circle);
     }
 }

src/main/java/duke/Event.java

@@ -51,7 +51,7 @@ public String getPrintMessage() {
     }
 
     /**
-     * Returns the message of this event
+     * Returns the message of this event.
      * @return message
      */
     @Override

src/main/java/duke/Launcher.java

@@ -3,8 +3,6 @@
 import javafx.application.Application;
 
 public class Launcher {
-    /** Empty constructor. */
-    private Launcher() { }
     /** Launches the Ui.
      * @param args input string (not used)
      */

src/main/java/duke/MainWithUi.java

@@ -7,16 +7,19 @@
 import javafx.scene.control.Label;
 import javafx.scene.control.ScrollPane;
 import javafx.scene.control.TextField;
-import javafx.scene.layout.*;
+import javafx.scene.layout.Background;
+import javafx.scene.layout.BackgroundFill;
+import javafx.scene.layout.AnchorPane;
+import javafx.scene.layout.CornerRadii;
+import javafx.scene.layout.Region;
+import javafx.scene.layout.VBox;
 import javafx.scene.paint.Color;
 import javafx.scene.paint.ImagePattern;
 import javafx.scene.shape.Circle;
 import javafx.scene.text.Text;
 import javafx.stage.Stage;
 import javafx.scene.image.Image;
 
-
-@SuppressWarnings("ALL")
 public class MainWithUi extends Application {
     private ScrollPane scrollPane;
     private VBox dialogContainer;

src/main/java/duke/Parser.java

@@ -1,6 +1,6 @@
 package duke;
 
-import duke_exceptions.*;
+import duke.exceptions.*;
 
 public class Parser {
     // constant SPACE and LINE for format purposes
@@ -23,7 +23,6 @@ public static String format(String input) {
     private final int EXTRA = 1;
 
     // current command: the whole line
-    @SuppressWarnings("CanBeFinal")
     private String command;
 
     /**
@@ -47,6 +46,7 @@ private String handleBye() {
     /**
      * Returns the list message called by user input "list".
      *
+     * @param lst the task list to be handled
      * @return formatted list message
      */
     private String handleList(TaskList lst) {
@@ -57,13 +57,15 @@ private String handleList(TaskList lst) {
     /**
      * Returns a raw list without any formatting.
      *
+     * @param lst the task list to be printed
      * @return a raw list string
      */
     private String taskPrint(TaskList lst) {
         StringBuilder listContent = new StringBuilder();
         int counter = 1;
         for (Task task : lst.getLst()) {
-            listContent.append(INDENT).append(counter).append(".").append(task.print()).append("\n");
+            listContent.append(INDENT).append(counter).append(".")
+                    .append(task.print()).append("\n");
             counter++;
         }
         return listContent.toString();
@@ -73,6 +75,7 @@ private String taskPrint(TaskList lst) {
      * Returns a formatted list message.
      *
      * @param content the raw list
+     * @param message the opening statement for print a list
      * @return a formatted string of "content"
      */
     private String formatList(String content, String message) {
@@ -136,7 +139,7 @@ private boolean isValid(String command) {
     }
 
     /**
-     * Returns a response string for "done" command
+     * Returns a response string for "done" command.
      *
      * @param lst the task list
      * @param command the command to be processed
@@ -171,7 +174,7 @@ private String handleDone(TaskList lst, String command) {
     }
 
     /**
-     * Returns a response string for "delete" command
+     * Returns a response string for "delete" command.
      *
      * @param lst the task list
      * @param command the command to be processed
@@ -200,22 +203,25 @@ private String handleDelete(TaskList lst, String command) {
         lst.delete(index);
 
         String messageDelete = "Noted. I've removed this task:\n";
-        return format(messageDelete + MORE_INDENT + task.print() + getListCountMessage(lst));
+        return format(messageDelete
+                + MORE_INDENT + task.print() + getListCountMessage(lst));
 
     }
 
     /**
-     * Returns a string listing all tasks in the task list
+     * Returns a string listing all tasks in the task list.
      *
      * @param lst the task list
      * @return a string listing all tasks in lst
      */
     private String getListCountMessage(TaskList lst) {
-        return "\n" + INDENT + "Now you have " + lst.size() + " task(s) in the list.";
+        return "\n" + INDENT + "Now you have " + lst.size()
+                + " task(s) in the list.";
     }
 
     /**
-     * Returns a response string listing all tasks containing the searching string
+     * Returns a response string
+     * listing all tasks containing the searching string.
      *
      * @param lst the task list
      * @param command the command to be processed
@@ -243,7 +249,7 @@ private String handleFind(TaskList lst, String command) {
     }
 
     /**
-     * Returns a response string for a new task command
+     * Returns a response string for a new task command.
      *
      * @param lst the task list
      * @param command the command to be processed
@@ -262,18 +268,20 @@ private String handleAdd(TaskList lst, String command, TaskType taskType) {
                 return format(new DeadlineEmptyBodyException().toString());
             case E:
                 return format(new EventEmptyBodyException().toString());
+            default:
             }
             return format(new UnknownCommandException().toString());
         }
 
         lst.addOfType(description, taskType);
         // a message to be printed when invoking a todo, event, or deadline
         String messageAdded = "Got it. I've added this task:\n";
-        return format(messageAdded + MORE_INDENT + getMostRecentTask(lst).print() + getListCountMessage(lst));
+        return format(messageAdded + MORE_INDENT
+                + getMostRecentTask(lst).print() + getListCountMessage(lst));
     }
 
     /**
-     * Returns the most recent task in the task list
+     * Returns the most recent task in the task list.
      *
      * @param lst the task list
      * @return the most recent task
@@ -292,7 +300,7 @@ private String handleHelp() {
     }
 
     /**
-     * Returns respond message to be printed generated from user input
+     * Returns respond message to be printed generated from user input.
      *
      * @param lst the task list
      * @return respond message by Duke

src/main/java/duke/Storage.java

@@ -1,6 +1,6 @@
 package duke;
 
-import duke_exceptions.IllegalTaskTypeException;
+import duke.exceptions.IllegalTaskTypeException;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileWriter;
@@ -13,7 +13,7 @@
  * Represents a storage and deals with loading tasks from
  * the file and saving tasks in the file.
  */
-@SuppressWarnings("ALL")
+
 public class Storage {
     private File file;
     Storage(Path path) {