Tried on b239/rpi with DIO VTS 1.1
============================

Test case code looks in the following way:

  public Status testCustomDeviceProviderOpen1() {
        try {
            Device ret = null;

            // Name doesn't match
            int id = syncRegister(DeviceManager.UNSPECIFIED_ID,
                    new TestDeviceConfig(new byte[]{3, 2, 1, 4, 5}), "TestDevice1", "hello=world");

            if (id == -2) {
                return Status.failed("Failed to register a TestDevice");
            }

            try {

                ret = DeviceManager.open("TestDevice", TestDevice.class, DeviceManager.EXCLUSIVE, "hello=world");

                log.println("Opened: " + ret);
                if (ret != null) {
                    log.println("Ret type: " + ret.getClass().getName());
                    return Status.failed("Unexpectedly found TestDevice which is not registered. " +
                            "Registry cleanup is probably needed.");
                } else {
                    return Status.failed("DeviceManager.open(\"TestDevice\", TestDevice.class, DeviceManager.EXCLUSIVE, \"hello=world\") returns null");
                }
            } catch (DeviceNotFoundException expected) {
            } catch (UnsupportedDeviceTypeException unexpected) {
                return Status.failed("TestDevice.class is unexpectedly not supported");
            } catch (IOException e) {
                return Status.failed("Unable open custom device");
            } finally {
                if (ret != null) try {
                    ret.close();
                } catch (IOException e) {
                    return Status.failed("Error closing device");
                }


                if (id != -2 && !syncUnRegister(id)) {
                    return Status.failed("Failed to unregister a TestDevice");
                }
            }

            return Status.passed("OKAY");
        } catch (Throwable t) {
            t.printStackTrace(log);
            return Status.failed("Unexpected Throwable: "+t);
        }
    }

==================
Test log is:

java.lang.NullPointerException: intf is null
at jdk.dio.DeviceManager.open(DeviceManager.java:730)
at jdk.dio.DeviceManager.open(DeviceManager.java:827)
at com.oracle.dio.registry.Registry$1.run(Registry.java:164)
at com.oracle.dio.registry.Registry$1.run(Registry.java:134)
at com.oracle.dio.utils.PrivilegeController$1.run(PrivilegeController.java:44)
at java.security.AccessController.doPrivileged(Native Method)
at com.oracle.dio.utils.PrivilegeController.doPrivileged(PrivilegeController.java:40)
at com.oracle.dio.registry.Registry.checkConfig(Registry.java:134)
at com.oracle.dio.registry.Registry.register(Registry.java:126)
at com.oracle.dio.registry.RegistryImpl.register(RegistryImpl.java:81)
at jdk.dio.DeviceManager.register(DeviceManager.java:929)
at com.oracle.tests.jdk.dio.spi.positive.SPIOpenTests.syncRegister(Unknown Source)
at com.oracle.tests.jdk.dio.spi.positive.SPIOpenTests.testCustomDeviceProviderOpen1(Unknown Source)
at com.oracle.tests.jdk.dio.spi.positive.SPIOpenTests.runTestCases(Unknown Source)
at com.sun.tck.cldc.lib.MultiTest.run(MultiTest.java:150)
at com.sun.tck.cdc.lib.ExecCLDCTestOnCDCSameJVMCmd.executeCLDCTest(ExecCLDCTestOnCDCSameJVMCmd.java:261)
at com.sun.tck.cdc.lib.ExecCLDCTestOnCDCSameJVMCmd.run(ExecCLDCTestOnCDCSameJVMCmd.java:196)
at com.sun.tck.j2me.agent.J2SEPlatformAdapter.execute(J2SEPlatformAdapter.java:97)
at com.sun.tck.j2me.execution.baseclient.BaseAgent.executeRequests(BaseAgent.java:242)
at com.sun.tck.j2me.execution.client.Agent.access$000(Agent.java:62)
at com.sun.tck.j2me.execution.client.Agent$Executor.run(Agent.java:108)
testCustomDeviceProviderOpen1: Failed. Unexpected Throwable: java.lang.NullPointerException: intf is null