diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java b/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java
index e83e85f3..48b43f0e 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java
@@ -218,7 +218,7 @@ public class Site {
      *
      * @deprecated
      * @see Spider#addRequest(Request...)
-     * @param startUrl
+     * @param startRequest
      * @return this
      */
     public Site addStartRequest(Request startRequest) {
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java b/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
index 6fe2880e..8af13381 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
@@ -142,7 +142,7 @@ public class Spider implements Runnable, Task {
      * Set startUrls of Spider.<br>
      * Prior to startUrls of Site.
      *
-     * @param startUrls
+     * @param startRequests
      * @return this
      */
     public Spider startRequest(List<Request> startRequests) {
@@ -218,7 +218,7 @@ public class Spider implements Runnable, Task {
     /**
      * set pipelines for Spider
      *
-     * @param pipeline
+     * @param pipelines
      * @return this
      * @see Pipeline
      * @since 0.4.1
@@ -477,7 +477,7 @@ public class Spider implements Runnable, Task {
     /**
      * Add urls with information to crawl.<br/>
      *
-     * @param urls
+     * @param requests
      * @return
      */
     public Spider addRequest(Request... requests) {
diff --git a/webmagic-selenium/src/main/java/us/codecraft/webmagic/downloader/selenium/WebDriverPool.java b/webmagic-selenium/src/main/java/us/codecraft/webmagic/downloader/selenium/WebDriverPool.java
index 98b93a9b..f628ede9 100644
--- a/webmagic-selenium/src/main/java/us/codecraft/webmagic/downloader/selenium/WebDriverPool.java
+++ b/webmagic-selenium/src/main/java/us/codecraft/webmagic/downloader/selenium/WebDriverPool.java
@@ -87,4 +87,5 @@ class WebDriverPool {
             webDriver.quit();
         }
     }
+
 }
diff --git a/webmagic-selenium/src/test/java/us/codecraft/webmagic/samples/HuabanProcessor.java b/webmagic-selenium/src/test/java/us/codecraft/webmagic/samples/HuabanProcessor.java
index fcfb068e..2854a766 100644
--- a/webmagic-selenium/src/test/java/us/codecraft/webmagic/samples/HuabanProcessor.java
+++ b/webmagic-selenium/src/test/java/us/codecraft/webmagic/samples/HuabanProcessor.java
@@ -30,7 +30,7 @@ public class HuabanProcessor implements PageProcessor {
 
     @Override
     public Site getSite() {
-        if (site == null) {
+        if (null == site) {
             site = Site.me().setDomain("huaban.com").setSleepTime(0);
         }
         return site;