Bug 529668 - Switch to Java 8

Change-Id: Icfa840b46ade2501fe8df0fd6721b220d86f6cc5
diff --git a/examples/org.eclipse.graphiti.doc/META-INF/MANIFEST.MF b/examples/org.eclipse.graphiti.doc/META-INF/MANIFEST.MF
index 56ad241..fabb9d8 100644
--- a/examples/org.eclipse.graphiti.doc/META-INF/MANIFEST.MF
+++ b/examples/org.eclipse.graphiti.doc/META-INF/MANIFEST.MF
@@ -12,4 +12,4 @@
  org.eclipse.graphiti.pattern;bundle-version="0.13.0",
  org.eclipse.graphiti.ui;bundle-version="0.13.0"
 Bundle-ClassPath: .
-Bundle-RequiredExecutionEnvironment: JavaSE-1.6
+Bundle-RequiredExecutionEnvironment: JavaSE-1.8