Add comments for nulls and create a constant. (#11)

Author: Konstantin Yakushev

src/main/java/com/bunq/tinker/LinkCard.java

@@ -8,12 +8,15 @@
 import com.bunq.tinker.utils.ITinker;
 import org.apache.commons.cli.CommandLine;
 import org.apache.commons.cli.ParseException;
-
 import java.util.ArrayList;
-import java.util.List;
 
 public class LinkCard implements ITinker {
 
+    /**
+     * Input constants.
+     */
+    private static final String CARD_PIN_ASSIGNMENT_TYPE_PRIMARY = "PRIMARY";
+
     /**
      * @param args
      *
@@ -31,7 +34,11 @@ public void run(String[] args) throws ParseException {
         String cardId = SharedLib.determineCardIdFromAllOptionOrStdIn(allOption);
         String accountId = SharedLib.determineAccountIdFromAllOptionOrStdIn(allOption);
 
-        allCardPinAssignment.add(new CardPinAssignment("PRIMARY",null, Integer.parseInt(accountId)));
+        allCardPinAssignment.add(new CardPinAssignment(
+            CARD_PIN_ASSIGNMENT_TYPE_PRIMARY,
+            null, /* pinCode */
+            Integer.parseInt(accountId))
+        );
 
         System.out.println();
         System.out.println("  | Link Card:    " + cardId);
@@ -45,12 +52,11 @@ public void run(String[] args) throws ParseException {
                 null, /* pinCode */
                 null, /* activationCode */
                 null, /* status */
-                null, /* limit */
+                null, /* cardLimit */
+                null, /* cardLimitAtm */
                 null, /* magStripePermissions */
                 null, /* countryPermission */
-                null,
-                allCardPinAssignment,
-                null
+                allCardPinAssignment
         );
 
         System.out.println();