diff --git a/src/test/java/de/ailis/usb4java/adapter/UsbDeviceAdapterTest.java b/src/test/java/de/ailis/usb4java/adapter/UsbDeviceAdapterTest.java
new file mode 100644
index 0000000..ee6d996
--- /dev/null
+++ b/src/test/java/de/ailis/usb4java/adapter/UsbDeviceAdapterTest.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2013 Klaus Reimer <k@ailis.de>
+ * See LICENSE.md for licensing information.
+ */
+package de.ailis.usb4java.adapter;
+
+import javax.usb.event.UsbDeviceDataEvent;
+import javax.usb.event.UsbDeviceErrorEvent;
+import javax.usb.event.UsbDeviceEvent;
+import javax.usb.event.UsbDeviceListener;
+
+import org.junit.Test;
+
+/**
+ * Test the {@link UsbDeviceAdapter} class. There is not really anything to
+ * test there. This class just ensures that the class exists and provides
+ * the needed methods.
+ *
+ * @author Klaus Reimer (k@ailis.de)
+ */
+public class UsbDeviceAdapterTest
+{
+    /**
+     * Ensure the existence of the needed methods.
+     */
+    @Test
+    public void testAbstractMethods()
+    {
+        final UsbDeviceListener adapter = new UsbDeviceAdapter()
+        {
+            // Empty
+        };
+        adapter.usbDeviceDetached((UsbDeviceEvent) null);
+        adapter.dataEventOccurred((UsbDeviceDataEvent) null);
+        adapter.errorEventOccurred((UsbDeviceErrorEvent) null);
+    }
+}
diff --git a/src/test/java/de/ailis/usb4java/adapter/UsbPipeAdapterTest.java b/src/test/java/de/ailis/usb4java/adapter/UsbPipeAdapterTest.java
new file mode 100644
index 0000000..fd8c27b
--- /dev/null
+++ b/src/test/java/de/ailis/usb4java/adapter/UsbPipeAdapterTest.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2013 Klaus Reimer <k@ailis.de>
+ * See LICENSE.md for licensing information.
+ */
+package de.ailis.usb4java.adapter;
+
+import javax.usb.event.UsbPipeDataEvent;
+import javax.usb.event.UsbPipeErrorEvent;
+import javax.usb.event.UsbPipeListener;
+
+import org.junit.Test;
+
+/**
+ * Test the {@link UsbPipeAdapter} class. There is not really anything to
+ * test there. This class just ensures that the class exists and provides
+ * the needed methods.
+ *
+ * @author Klaus Reimer (k@ailis.de)
+ */
+public class UsbPipeAdapterTest
+{
+    /**
+     * Ensure the existence of the needed methods.
+     */
+    @Test
+    public void testAbstractMethods()
+    {
+        final UsbPipeListener adapter = new UsbPipeAdapter()
+        {
+            // Empty
+        };
+        adapter.dataEventOccurred((UsbPipeDataEvent) null);
+        adapter.errorEventOccurred((UsbPipeErrorEvent) null);
+    }
+}
diff --git a/src/test/java/de/ailis/usb4java/adapter/UsbServicesAdapterTest.java b/src/test/java/de/ailis/usb4java/adapter/UsbServicesAdapterTest.java
new file mode 100644
index 0000000..73d2961
--- /dev/null
+++ b/src/test/java/de/ailis/usb4java/adapter/UsbServicesAdapterTest.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2013 Klaus Reimer <k@ailis.de>
+ * See LICENSE.md for licensing information.
+ */
+package de.ailis.usb4java.adapter;
+
+import javax.usb.event.UsbServicesEvent;
+import javax.usb.event.UsbServicesListener;
+
+import org.junit.Test;
+
+/**
+ * Test the {@link UsbServicesAdapter} class. There is not really anything to
+ * test there. This class just ensures that the class exists and provides
+ * the needed methods.
+ *
+ * @author Klaus Reimer (k@ailis.de)
+ */
+public class UsbServicesAdapterTest
+{
+    /**
+     * Ensure the existence of the needed methods.
+     */
+    @Test
+    public void testAbstractMethods()
+    {
+        final UsbServicesListener adapter = new UsbServicesAdapter()
+        {
+            // Empty
+        };
+        adapter.usbDeviceAttached((UsbServicesEvent) null);
+        adapter.usbDeviceDetached((UsbServicesEvent) null);
+    }
+}