Fix: travis checkstyle violation

Author: muhd97

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

@@ -6,7 +6,14 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import seedu.address.logic.commands.*;
+import seedu.address.logic.commands.AddCommand;
+import seedu.address.logic.commands.ClearCommand;
+import seedu.address.logic.commands.Command;
+import seedu.address.logic.commands.DeleteCommand;
+import seedu.address.logic.commands.ExitCommand;
+import seedu.address.logic.commands.FindCommand;
+import seedu.address.logic.commands.HelpCommand;
+import seedu.address.logic.commands.ListCommand;
 import seedu.address.logic.commands.ModifyCommand;
 import seedu.address.logic.parser.exceptions.ParseException;