Add skeleton Email feature (#51)

* Add new unimplemented email command

* Fix line endings

src/main/java/seedu/address/logic/commands/EmailCommand.java

@@ -0,0 +1,26 @@
+package seedu.address.logic.commands;
+
+import seedu.address.logic.commands.exceptions.CommandException;
+import seedu.address.model.Model;
+
+/**
+ * Handles the sending of emails to interviewers/interviewees based on the email addresses associated with
+ * the object.
+ */
+public class EmailCommand extends Command {
+
+    public static final String COMMAND_WORD = "email";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD + ": Handles the sending of emails to "
+            + "interviewers/interviewees using their email addresses.\n\n"
+            + COMMAND_WORD + " timeslots\n"
+            + "Sends an email containing the interviewee's allocated interview time slot to every "
+            + "interviewee, including other details such as the interviewer, time, date and location.";
+
+    public static final String MESSAGE_NOT_IMPLEMENTED_YET = "Email command not implemented yet";
+
+    @Override
+    public CommandResult execute(Model model) throws CommandException {
+        throw new CommandException(MESSAGE_NOT_IMPLEMENTED_YET);
+    }
+}

src/main/java/seedu/address/logic/parser/AddressBookParser.java

@@ -11,6 +11,7 @@
 import seedu.address.logic.commands.Command;
 import seedu.address.logic.commands.DeleteCommand;
 import seedu.address.logic.commands.EditCommand;
+import seedu.address.logic.commands.EmailCommand;
 import seedu.address.logic.commands.ExitCommand;
 import seedu.address.logic.commands.FindCommand;
 import seedu.address.logic.commands.HelpCommand;
@@ -68,6 +69,9 @@ public Command parseCommand(String userInput) throws ParseException {
         case HelpCommand.COMMAND_WORD:
             return new HelpCommand();
 
+        case EmailCommand.COMMAND_WORD:
+            return new EmailCommand();
+
         default:
             throw new ParseException(MESSAGE_UNKNOWN_COMMAND);
         }

src/test/java/seedu/address/logic/commands/EmailCommandTest.java

@@ -0,0 +1,18 @@
+package seedu.address.logic.commands;
+
+import static seedu.address.logic.commands.CommandTestUtil.assertCommandFailure;
+import static seedu.address.logic.commands.EmailCommand.MESSAGE_NOT_IMPLEMENTED_YET;
+
+import org.junit.jupiter.api.Test;
+
+import seedu.address.model.Model;
+import seedu.address.model.ModelManager;
+
+public class EmailCommandTest {
+    private Model model = new ModelManager();
+
+    @Test
+    public void execute_email_failure() {
+        assertCommandFailure(new EmailCommand(), model, MESSAGE_NOT_IMPLEMENTED_YET);
+    }
+}

src/test/java/seedu/address/logic/parser/AddressBookParserTest.java

@@ -18,6 +18,7 @@
 import seedu.address.logic.commands.DeleteCommand;
 import seedu.address.logic.commands.EditCommand;
 import seedu.address.logic.commands.EditCommand.EditPersonDescriptor;
+import seedu.address.logic.commands.EmailCommand;
 import seedu.address.logic.commands.ExitCommand;
 import seedu.address.logic.commands.FindCommand;
 import seedu.address.logic.commands.HelpCommand;
@@ -88,6 +89,12 @@ public void parseCommand_list() throws Exception {
         assertTrue(parser.parseCommand(ListCommand.COMMAND_WORD + " 3") instanceof ListCommand);
     }
 
+    @Test
+    public void parseCommand_email() throws Exception {
+        assertTrue(parser.parseCommand(EmailCommand.COMMAND_WORD) instanceof EmailCommand);
+        assertTrue(parser.parseCommand(EmailCommand.COMMAND_WORD + " timeslots") instanceof EmailCommand);
+    }
+
     @Test
     public void parseCommand_unrecognisedInput_throwsParseException() {
         assertThrows(ParseException.class, String.format(MESSAGE_INVALID_COMMAND_FORMAT, HelpCommand.MESSAGE_USAGE), ()