protected Process createBPEL() {

		Process process = null;

		try {
			ResourceSet rSet = new ResourceSetImpl();
			rSet.getResourceFactoryRegistry().getExtensionToFactoryMap()
					.put("xml", new GenericXMLResourceFactoryImpl());
			File file = new File("myfile.xml");
			file.createNewFile();
			String filePath = file.getAbsolutePath();
			System.out.println(filePath);
			Resource resource = rSet.createResource(URI.createFileURI(filePath));

			process = factory.createProcess();
			process.setName("FirstBPEL");
			Sequence seq = factory.createSequence();
			seq.setName("MainSequence");
			
			Receive recieve = factory.createReceive();
			PortType portType = new PortTypeProxy(URI.createURI("http://baseuri"), new QName("qname"));
			Operation operation = 
                               new OperationProxy(URI.createURI("http://localhost"), portType , "operation_name");
			recieve.setOperation(operation);
			
			Invoke invoke = factory.createInvoke();
			invoke.setOperation(operation);
			
			
			While whiles = factory.createWhile();
			If if_st = factory.createIf();
			
			List<Activity> activs = new ArrayList<Activity>();
			activs.add(recieve);
			activs.add(invoke);
			activs.add(if_st);
			activs.add(whiles);
			
			
			seq.getActivities().addAll(activs);
			
			process.setActivity(seq);

			resource.getContents().add(process);
			resource.save(null);
		} catch (Exception e) {
			e.printStackTrace();
		}

		return process;
	}

AdapterRegistry.INSTANCE.registerAdapterFactory( BPELPackage.eINSTANCE, BasicBPELAdapterFactory.INSTANCE );

java.lang.IllegalStateException: INamespaceMap cannot be attached to an eObject