Refactor concrete WebDriverException#getSupportUrl's

Extract urls to constants.

Signed-off-by: Daniel Davison <daniel.jj.davison@gmail.com>

Author: alb-i986

java/client/src/org/openqa/selenium/InvalidSelectorException.java

@@ -27,6 +27,9 @@
  */
 public class InvalidSelectorException extends NoSuchElementException {
 
+  private static final String SUPPORT_URL =
+    BASE_SUPPORT_URL + "invalid_selector_exception.html";
+
   public InvalidSelectorException(String reason) {
     super(reason);
   }
@@ -37,6 +40,6 @@ public InvalidSelectorException(String reason, Throwable cause) {
 
   @Override
   public String getSupportUrl() {
-    return "http://seleniumhq.org/exceptions/invalid_selector_exception.html";
+    return SUPPORT_URL;
   }
 }

java/client/src/org/openqa/selenium/NoSuchElementException.java

@@ -23,6 +23,9 @@
  */
 public class NoSuchElementException extends NotFoundException {
 
+  private static final String SUPPORT_URL =
+    BASE_SUPPORT_URL + "no_such_element.html";
+
   public NoSuchElementException(String reason) {
     super(reason);
   }
@@ -33,6 +36,6 @@ public NoSuchElementException(String reason, Throwable cause) {
 
   @Override
   public String getSupportUrl() {
-    return "http://seleniumhq.org/exceptions/no_such_element.html";
+    return SUPPORT_URL;
   }
 }

java/client/src/org/openqa/selenium/StaleElementReferenceException.java

@@ -23,6 +23,10 @@
  * DOM of the page.
  */
 public class StaleElementReferenceException extends WebDriverException {
+
+  private static final String SUPPORT_URL =
+    BASE_SUPPORT_URL + "stale_element_reference.html";
+
   public StaleElementReferenceException(String message) {
     super(message);
   }
@@ -33,6 +37,6 @@ public StaleElementReferenceException(String message, Throwable cause) {
 
   @Override
   public String getSupportUrl() {
-    return "http://seleniumhq.org/exceptions/stale_element_reference.html";
+    return SUPPORT_URL;
   }
 }

java/client/src/org/openqa/selenium/WebDriverException.java

@@ -28,6 +28,7 @@ public class WebDriverException extends RuntimeException {
 
   public static final String SESSION_ID = "Session ID";
   public static final String DRIVER_INFO = "Driver info";
+  protected static final String BASE_SUPPORT_URL = "http://seleniumhq.org/exceptions/";
 
   private Map<String, String> extraInfo = new HashMap<>();