Add Checkstyle to enforce codestyle rules

Rules are based on Sun style with a few minor modifications

Change-Id: If9e772105053c67550e4f206024fea26b65e611b
diff --git a/src/main/java/com/intel/jndn/management/ManagementException.java b/src/main/java/com/intel/jndn/management/ManagementException.java
index 89a0b25..8e2edfd 100644
--- a/src/main/java/com/intel/jndn/management/ManagementException.java
+++ b/src/main/java/com/intel/jndn/management/ManagementException.java
@@ -26,23 +26,28 @@
  */
 public class ManagementException extends Exception {
   /**
-   * Constructor from the message
+   * Constructor from the message.
+   * @param message Error message
    */
-  public ManagementException(String message) {
+  public ManagementException(final String message) {
     super(message);
   }
 
   /**
-   * Constructor from the message and the cause
+   * Constructor from the message and the cause.
+   * @param message Error message
+   * @param cause Chained exception
    */
-  public ManagementException(String message, Throwable cause) {
+  public ManagementException(final String message, final Throwable cause) {
     super(message, cause);
   }
 
   /**
-   * Parse an NFD response to create a ManagementException.
+   * Create exception from NFD's ControlResponse.
+   * @param response ControlResponse from which to use status code and status text
+   * @return new instance of ManagementException
    */
-  public static ManagementException fromResponse(ControlResponse response) {
+  public static ManagementException fromResponse(final ControlResponse response) {
     String message = "Action failed, forwarder returned: " + response.getStatusCode() + " " + response.getStatusText();
     return new ManagementException(message);
   }