Fix checkstyle

src/main/java/seedu/duke/data/Date.java

@@ -66,4 +66,4 @@ public static Date now() throws Exception {
         Date now = new Date(LocalDate.now().format(toStringFormatter), false);
         return now;
     }
-}
+}

src/test/java/seedu/duke/parser/ParserTest.java

@@ -28,7 +28,7 @@ public void parse_emptyInput_returnsIncorrect() {
     }
 
     @Test
-    public void parse_unknownCommandWord_returnsHelp() {
+    public void parse_unknownCommandWord_returnsHelp() throws Exception {
         final String input = "unknowncommandword arguments arguments";
         parseAndAssertCommandType(input, HelpCommand.class);
     }
@@ -38,13 +38,13 @@ public void parse_unknownCommandWord_returnsHelp() {
      */
 
     @Test
-    public void parse_helpCommand_parsedCorrectly() {
+    public void parse_helpCommand_parsedCorrectly() throws Exception {
         final String input = "help";
         parseAndAssertCommandType(input, HelpCommand.class);
     }
 
     @Test
-    public void parse_exitCommand_parsedCorrectly() {
+    public void parse_exitCommand_parsedCorrectly() throws Exception {
         final String input = "exit";
         parseAndAssertCommandType(input, ExitCommand.class);
     }
@@ -56,7 +56,7 @@ public void parse_exitCommand_parsedCorrectly() {
     /**
      * Asserts that parsing the given inputs will return IncorrectCommand with the given feedback message.
      */
-    private void parseAndAssertIncorrectWithMessage(String feedbackMessage, String... inputs) {
+    private void parseAndAssertIncorrectWithMessage(String feedbackMessage, String... inputs) throws Exception {
         for (String input : inputs) {
             final IncorrectCommand result = parseAndAssertCommandType(input, IncorrectCommand.class);
             assertEquals(result.feedbackToUser, feedbackMessage);