Add JavaDocs

Do using IntelliJ JavaDocs plugin. Better to have something than nothing.

src/main/java/org/kohsuke/github/GHSubscription.java

@@ -7,8 +7,8 @@ import java.util.Date;
  * Represents your subscribing to a repository / conversation thread..
  *
  * @author Kohsuke Kawaguchi
- * @see GHRepository#getSubscription()
- * @see GHThread#getSubscription()
+ * @see GHRepository#getSubscription() GHRepository#getSubscription()
+ * @see GHThread#getSubscription() GHThread#getSubscription()
  */
 public class GHSubscription {
     private String created_at, url, repository_url, reason;
@@ -17,36 +17,74 @@ public class GHSubscription {
     private GitHub root;
     private GHRepository repo;
 
+    /**
+     * Gets created at.
+     *
+     * @return the created at
+     */
     public Date getCreatedAt() {
         return GitHub.parseDate(created_at);
     }
 
+    /**
+     * Gets url.
+     *
+     * @return the url
+     */
     public String getUrl() {
         return url;
     }
 
+    /**
+     * Gets repository url.
+     *
+     * @return the repository url
+     */
     public String getRepositoryUrl() {
         return repository_url;
     }
 
+    /**
+     * Gets reason.
+     *
+     * @return the reason
+     */
     public String getReason() {
         return reason;
     }
 
+    /**
+     * Is subscribed boolean.
+     *
+     * @return the boolean
+     */
     public boolean isSubscribed() {
         return subscribed;
     }
 
+    /**
+     * Is ignored boolean.
+     *
+     * @return the boolean
+     */
     public boolean isIgnored() {
         return ignored;
     }
 
+    /**
+     * Gets repository.
+     *
+     * @return the repository
+     */
     public GHRepository getRepository() {
         return repo;
     }
 
     /**
      * Removes this subscription.
+     *
+     * @throws IOException
+     *             the io exception
      */
     public void delete() throws IOException {
         new Requester(root).method("DELETE").to(repo.getApiTailUrl("subscription"));