Add device type extension config

components/device-mgt/org.wso2.carbon.device.mgt.extensions/src/main/java/org/wso2/carbon/device/mgt/extensions/device/type/template/config/DeviceTypeManagerExtensionConfig.java

@@ -0,0 +1,19 @@
+package org.wso2.carbon.device.mgt.extensions.device.type.template.config;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+
+@XmlRootElement(name = "DeviceTypeManagerExtensionConfig")
+public class DeviceTypeManagerExtensionConfig {
+
+    private String extensionClass;
+
+    @XmlElement(name = "ExtensionClass", required = true)
+    public String getExtensionClass() {
+        return extensionClass;
+    }
+
+    public void setExtensionClass(String extensionClass) {
+        this.extensionClass = extensionClass;
+    }
+}