Fix checkstyle errors

azure-client-runtime/src/main/java/com/microsoft/azure/AzureServiceCall.java

@@ -9,14 +9,13 @@
 
 import com.microsoft.rest.ServiceCall;
 import com.microsoft.rest.ServiceResponse;
-
-import java.util.List;
-
 import com.microsoft.rest.ServiceResponseWithHeaders;
 import rx.Observable;
 import rx.Subscriber;
 import rx.functions.Func1;
 
+import java.util.List;
+
 /**
  * An instance of this class provides access to the underlying REST call invocation.
  * This class wraps around the Retrofit Call object and allows updates to it in the
@@ -46,6 +45,16 @@ public static <E> ServiceCall<List<E>> create(Observable<ServiceResponse<Page<E>
         return serviceCall;
     }
 
+    /**
+     * Creates a ServiceCall from a paging operation that returns a header response.
+     *
+     * @param first the observable to the first page
+     * @param next the observable to poll subsequent pages
+     * @param callback the client-side callback
+     * @param <E> the element type
+     * @param <V> the header object type
+     * @return the future based ServiceCall
+     */
     public static <E, V> ServiceCall<List<E>> createWithHeaders(Observable<ServiceResponseWithHeaders<Page<E>, V>> first, final Func1<String, Observable<ServiceResponseWithHeaders<Page<E>, V>>> next, final ListOperationCallback<E> callback) {
         final AzureServiceCall<List<E>> serviceCall = new AzureServiceCall<>();
         final PagingSubscriber<E> subscriber = new PagingSubscriber<>(serviceCall, new Func1<String, Observable<ServiceResponse<Page<E>>>>() {

client-runtime/src/main/java/com/microsoft/rest/ServiceCall.java

@@ -9,10 +9,8 @@
 
 import com.google.common.util.concurrent.AbstractFuture;
 import rx.Observable;
-import rx.Scheduler;
 import rx.Subscription;
 import rx.functions.Action1;
-import rx.functions.Func1;
 
 /**
  * An instance of this class provides access to the underlying REST call invocation.