added some cli code

src/main/java/application/DDITApplication.java

+package application;
+
+import command.CommandSelector;
+
+public class DDITApplication {
+    public static void main(String[] args) {
+        CommandSelector commandSelector = new CommandSelector();
+        commandSelector.executeCommand();
+    }
+}

src/main/java/cli/CommandLineInterface.java

+package cli;
+
+import org.apache.commons.cli.*;
+
+public class CommandLineInterface {
+
+    private Options options;
+    private String[] userInput;
+
+    public CommandLineInterface(String[] userInput){
+        this.options = new Options();
+        this.userInput = userInput;
+        options.addOption("create", "create an issue");
+        options.addOption("push", "push issues");
+    }
+
+    public CommandLine getInput() throws ParseException {
+        CommandLineParser parser = new DefaultParser();
+        return parser.parse(options, userInput);
+    }
+}

src/main/java/command/CommandSelector.java

@@ -2,9 +2,8 @@ package command;
 
 public class CommandSelector {
 
-    private Command command = null;
-
     public void executeCommand(String enteredCommand) {
+        Command command; //possibly make field
         if (enteredCommand.equals("issue")) {
             command = createIssue();
         } else if (enteredCommand.equals("push")) {
@@ -12,7 +11,6 @@ public class CommandSelector {
         } else {
             command = help();
         }
-
         command.execute();
     }