added API Error example - mark maven unstable

DO NOT MERGE

#2486

Jenkinsfile

@@ -33,7 +33,9 @@ pipeline {
 					recordIssues(publishAllIssues:false, ignoreQualityGate:true,
 						tool: eclipse(name: 'Compiler and API Tools', pattern: '**/target/compilelogs/*.xml'),
 						qualityGates: [[threshold: 1, type: 'DELTA', unstable: true]])
-					recordIssues publishAllIssues:false, tools: [mavenConsole(), javaDoc()]
+					recordIssues publishAllIssues:false, ignoreQualityGate:true,
+						tools: [mavenConsole(), javaDoc()]
+						qualityGates: [[threshold: 1, type: 'DELTA', unstable: true]])
 				}
 			}
 		}

bundles/org.eclipse.ui.browser/src/org/eclipse/ui/browser/BrowserFactory.java

@@ -30,6 +30,14 @@ public boolean isAvailable() {
 		return true;
 	}
 
+	/**
+	 * Implementators of <code>org.eclipse.ui.browser.browsers</code> extension
+	 * points must provide an implementation of this abstract class.
+	 *
+	 * @since 3.8
+	 */
+	public void addedWithoutUpdate() {
+	}
 	/**
 	 * Obtains a new instance of a web browser.
 	 *