added javadocs, v4.2.4

checkstyle.xml

@@ -63,7 +63,9 @@
 
     <!-- Checks whether files end with a new line.                        -->
     <!-- See http://checkstyle.sf.net/config_misc.html#NewlineAtEndOfFile -->
-    <module name="NewlineAtEndOfFile"/>
+    <module name="NewlineAtEndOfFile">
+        <property name="lineSeparator" value="lf"/>
+    </module>
 
     <!-- Checks that property files contain the same keys.         -->
     <!-- See http://checkstyle.sf.net/config_misc.html#Translation -->

src/main/java/ai/preferred/venom/fetcher/AsyncFetcher.java

@@ -132,12 +132,25 @@ public final class AsyncFetcher implements Fetcher {
    */
   private final boolean compressed;
 
+  /**
+   * Creates {@link BasicFuture} and fails the request with a specified exception.
+   *
+   * @param callback request callback
+   * @param ex       specified exeption
+   * @return BasicFuture created
+   */
   private static Future<Response> failRequest(final FutureCallback<Response> callback, final Exception ex) {
     final BasicFuture<Response> f = new BasicFuture<>(callback);
     f.failed(ex);
     return f;
   }
 
+  /**
+   * Creates {@link BasicFuture} and cancels the request.
+   *
+   * @param callback request callback
+   * @return BasicFuture created
+   */
   private static Future<Response> cancelRequest(final FutureCallback<Response> callback) {
     final BasicFuture<Response> f = new BasicFuture<>(callback);
     f.cancel(true);