added execution environment JSE1.5
diff --git a/examples/org.eclipse.gef3d.examples.graph/.classpath b/examples/org.eclipse.gef3d.examples.graph/.classpath
index 508ca31..1ffb089 100644
--- a/examples/org.eclipse.gef3d.examples.graph/.classpath
+++ b/examples/org.eclipse.gef3d.examples.graph/.classpath
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="src" path="src/java"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src/java"/>
 	<classpathentry kind="output" path="build/classes"/>
 </classpath>
diff --git a/examples/org.eclipse.gef3d.examples.graph/META-INF/MANIFEST.MF b/examples/org.eclipse.gef3d.examples.graph/META-INF/MANIFEST.MF
index ec7c2b1..a0d81dc 100644
--- a/examples/org.eclipse.gef3d.examples.graph/META-INF/MANIFEST.MF
+++ b/examples/org.eclipse.gef3d.examples.graph/META-INF/MANIFEST.MF
@@ -19,3 +19,4 @@
  org.eclipse.draw3d.ui;bundle-version="0.8.1"
 Bundle-ActivationPolicy: lazy
 Bundle-Activator: org.eclipse.gef3d.examples.graph.GEF3DGraphExamplePlugin
+Bundle-RequiredExecutionEnvironment: J2SE-1.5