diff --git a/lib/extension/extensionTemplate.js b/lib/extension/baseExtension.js
similarity index 76%
rename from lib/extension/extensionTemplate.js
rename to lib/extension/baseExtension.js
index 5eb16445..5891eed3 100644
--- a/lib/extension/extensionTemplate.js
+++ b/lib/extension/baseExtension.js
@@ -1,10 +1,4 @@
-/* istanbul ignore file */
-
-/**
- * This extensions is for documentation purposes only.
- * It describes all methods that are called by the controller.
- */
-class ExtensionTemplate {
+class BaseExtension {
     /**
      * Besides intializing variables, the constructor should do nothing!
      *
@@ -23,12 +17,12 @@ class ExtensionTemplate {
     /**
      * This method is called by the controller once Zigbee has been started.
      */
-    onZigbeeStarted() {}
+    // onZigbeeStarted() {}
 
     /**
      * This method is called by the controller once connected to the MQTT server.
      */
-    onMQTTConnected() {}
+    // onMQTTConnected() {}
 
     /**
      * Is called when a Zigbee message from a device is received.
@@ -36,7 +30,7 @@ class ExtensionTemplate {
      * @param {Object?} device The device of the message (can be null)
      * @param {Object?} mappedDevice The mapped device (can be null)
      */
-    onZigbeeMessage(message, device, mappedDevice) {}
+    // onZigbeeMessage(message, device, mappedDevice) {}
 
     /**
      * Is called when a MQTT message is received
@@ -44,14 +38,12 @@ class ExtensionTemplate {
      * @param {Object} message The received message
      * @return {boolean} if the message was handled
      */
-    onMQTTMessage(topic, message) {
-        return false;
-    }
+    // onMQTTMessage(topic, message) {}
 
     /**
      * Is called once the extension has to stop
      */
-    stop() {}
+    // stop() {}
 }
 
-module.exports = ExtensionTemplate;
+module.exports = BaseExtension;
diff --git a/lib/extension/bridgeConfig.js b/lib/extension/bridgeConfig.js
index acaec623..08794f97 100644
--- a/lib/extension/bridgeConfig.js
+++ b/lib/extension/bridgeConfig.js
@@ -3,16 +3,14 @@ const logger = require('../util/logger');
 const zigbeeHerdsmanConverters = require('zigbee-herdsman-converters');
 const utils = require('../util/utils');
 const assert = require('assert');
+const BaseExtension = require('./baseExtension');
 
 const configRegex = new RegExp(`${settings.get().mqtt.base_topic}/bridge/config/((?:\\w+/get)|(?:\\w+))`);
 const allowedLogLevels = ['error', 'warn', 'info', 'debug'];
 
-class BridgeConfig {
+class BridgeConfig extends BaseExtension {
     constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
-        this.mqtt = mqtt;
-        this.state = state;
-        this.publishEntityState = publishEntityState;
+        super(zigbee, mqtt, state, publishEntityState);
 
         // Bind functions
         this.permitJoin = this.permitJoin.bind(this);
diff --git a/lib/extension/deviceAvailability.js b/lib/extension/deviceAvailability.js
index 462e9940..298a6306 100644
--- a/lib/extension/deviceAvailability.js
+++ b/lib/extension/deviceAvailability.js
@@ -2,6 +2,7 @@ const logger = require('../util/logger');
 const settings = require('../util/settings');
 const utils = require('../util/utils');
 const zigbeeHerdsmanConverters = require('zigbee-herdsman-converters');
+const BaseExtension = require('./baseExtension');
 
 // Some EndDevices should be pinged
 // e.g. E11-G13 https://github.com/Koenkk/zigbee2mqtt/issues/775#issuecomment-453683846
@@ -14,10 +15,10 @@ const toZigbeeCandidates = ['state', 'brightness', 'color', 'color_temp'];
 /**
  * This extensions pings devices to check if they are online.
  */
-class DeviceAvailability {
+class DeviceAvailability extends BaseExtension {
     constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
-        this.mqtt = mqtt;
+        super(zigbee, mqtt, state, publishEntityState);
+
         this.availability_timeout = settings.get().advanced.availability_timeout;
         this.timers = {};
         this.state = {};
diff --git a/lib/extension/deviceBind.js b/lib/extension/deviceBind.js
index dc112710..ca2e35c5 100644
--- a/lib/extension/deviceBind.js
+++ b/lib/extension/deviceBind.js
@@ -2,17 +2,11 @@ const settings = require('../util/settings');
 const logger = require('../util/logger');
 const assert = require('assert');
 const topicRegex = new RegExp(`^${settings.get().mqtt.base_topic}/bridge/(bind|unbind)/.+$`);
+const BaseExtension = require('./baseExtension');
 
 const clusters = ['genScenes', 'genOnOff', 'genLevelCtrl', 'lightingColorCtrl'];
 
-class DeviceBind {
-    constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
-        this.mqtt = mqtt;
-        this.state = state;
-        this.publishEntityState = publishEntityState;
-    }
-
+class DeviceBind extends BaseExtension {
     onMQTTConnected() {
         this.mqtt.subscribe(`${settings.get().mqtt.base_topic}/bridge/bind/+`);
         this.mqtt.subscribe(`${settings.get().mqtt.base_topic}/bridge/bind/+/+`);
diff --git a/lib/extension/deviceConfigure.js b/lib/extension/deviceConfigure.js
index fd7241d7..9be90ceb 100644
--- a/lib/extension/deviceConfigure.js
+++ b/lib/extension/deviceConfigure.js
@@ -1,10 +1,12 @@
 const settings = require('../util/settings');
 const logger = require('../util/logger');
 const zigbeeHerdsmanConverters = require('zigbee-herdsman-converters');
+const BaseExtension = require('./baseExtension');
 
-class DeviceConfigure {
+class DeviceConfigure extends BaseExtension {
     constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
+        super(zigbee, mqtt, state, publishEntityState);
+
         this.configuring = new Set();
         this.attempts = {};
     }
diff --git a/lib/extension/deviceGroupMembership.js b/lib/extension/deviceGroupMembership.js
index 951e6edd..2dbbd3f3 100644
--- a/lib/extension/deviceGroupMembership.js
+++ b/lib/extension/deviceGroupMembership.js
@@ -1,16 +1,11 @@
 /* istanbul ignore file */
 const settings = require('../util/settings');
 const logger = require('../util/logger');
+const BaseExtension = require('./baseExtension');
 
 const topicRegex = new RegExp(`^${settings.get().mqtt.base_topic}/bridge/device/(.+)/get_group_membership$`);
 
-class DeviceGroupMembership {
-    constructor(zigbee, mqtt, publishEntityState) {
-        this.zigbee = zigbee;
-        this.mqtt = mqtt;
-        this.publishEntityState = publishEntityState;
-    }
-
+class DeviceGroupMembership extends BaseExtension {
     onMQTTConnected() {
         this.mqtt.subscribe(`${settings.get().mqtt.base_topic}/bridge/device/+/get_group_membership`);
     }
diff --git a/lib/extension/deviceReceive.js b/lib/extension/deviceReceive.js
index 364a022a..43beba78 100644
--- a/lib/extension/deviceReceive.js
+++ b/lib/extension/deviceReceive.js
@@ -2,13 +2,11 @@ const settings = require('../util/settings');
 const logger = require('../util/logger');
 const utils = require('../util/utils');
 const debounce = require('debounce');
+const BaseExtension = require('./baseExtension');
 
-class DeviceReceive {
+class DeviceReceive extends BaseExtension {
     constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
-        this.mqtt = mqtt;
-        this.state = state;
-        this.publishEntityState = publishEntityState;
+        super(zigbee, mqtt, state, publishEntityState);
         this.coordinator = null;
         this.elapsed = {};
         this.debouncers = {};
diff --git a/lib/extension/deviceReport.js b/lib/extension/deviceReport.js
index cb6e02dd..0ff5b598 100644
--- a/lib/extension/deviceReport.js
+++ b/lib/extension/deviceReport.js
@@ -2,6 +2,7 @@ const zigbeeHerdsmanConverters = require('zigbee-herdsman-converters');
 const logger = require('../util/logger');
 const CC2530Router = zigbeeHerdsmanConverters.devices.find((d) => d.model === 'CC2530.ROUTER');
 const utils = require('../util/utils');
+const BaseExtension = require('./baseExtension');
 
 const defaultConfiguration = {
     minimumReportInterval: 3, maximumReportInterval: 300, reportableChange: 0,
@@ -27,12 +28,9 @@ const clusters = {
     ],
 };
 
-class DeviceReport {
+class DeviceReport extends BaseExtension {
     constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
-        this.mqtt = mqtt;
-        this.state = state;
-        this.publishEntityState = publishEntityState;
+        super(zigbee, mqtt, state, publishEntityState);
         this.configuring = new Set();
     }
 
diff --git a/lib/extension/entityPublish.js b/lib/extension/entityPublish.js
index 93dbfe74..be1a4181 100644
--- a/lib/extension/entityPublish.js
+++ b/lib/extension/entityPublish.js
@@ -4,6 +4,7 @@ const zigbeeHerdsmanConverters = require('zigbee-herdsman-converters');
 const logger = require('../util/logger');
 const utils = require('../util/utils');
 const assert = require('assert');
+const BaseExtension = require('./baseExtension');
 
 const postfixes = utils.getPostfixes();
 const topicRegex = new RegExp(`^(.+?)(?:/(${postfixes.join('|')}))?/(get|set)(?:/(.+))?`);
@@ -16,14 +17,7 @@ const groupConverters = [
     zigbeeHerdsmanConverters.toZigbeeConverters.ignore_transition,
 ];
 
-class EntityPublish {
-    constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
-        this.mqtt = mqtt;
-        this.state = state;
-        this.publishEntityState = publishEntityState;
-    }
-
+class EntityPublish extends BaseExtension {
     onMQTTConnected() {
         // Subscribe to topics.
         const baseTopic = settings.get().mqtt.base_topic;
diff --git a/lib/extension/groups.js b/lib/extension/groups.js
index d39fc734..46295ca2 100644
--- a/lib/extension/groups.js
+++ b/lib/extension/groups.js
@@ -1,15 +1,14 @@
 const settings = require('../util/settings');
 const logger = require('../util/logger');
+const BaseExtension = require('./baseExtension');
 
 const topicRegex = new RegExp(`^${settings.get().mqtt.base_topic}/bridge/group/(.+)/(remove|add|remove_all)$`);
 const topicRegexRemoveAll = new RegExp(`^${settings.get().mqtt.base_topic}/bridge/group/remove_all$`);
 
-class Groups {
+class Groups extends BaseExtension {
     constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
-        this.mqtt = mqtt;
-        this.state = state;
-        this.publishEntityState = publishEntityState;
+        super(zigbee, mqtt, state, publishEntityState);
+        this.onStateChange = this.onStateChange.bind(this);
     }
 
     onMQTTConnected() {
diff --git a/lib/extension/homeassistant.js b/lib/extension/homeassistant.js
index ac30ea72..dffec5a4 100644
--- a/lib/extension/homeassistant.js
+++ b/lib/extension/homeassistant.js
@@ -2,6 +2,7 @@ const zigbeeHerdsmanConverters = require('zigbee-herdsman-converters');
 const settings = require('../util/settings');
 const logger = require('../util/logger');
 const zigbee2mqttVersion = require('../../package.json').version;
+const BaseExtension = require('./baseExtension');
 
 const configurations = {
     // Binary sensor
@@ -907,12 +908,9 @@ Object.keys(mapping).forEach((key) => {
 /**
  * This extensions handles integration with HomeAssistant
  */
-class HomeAssistant {
+class HomeAssistant extends BaseExtension {
     constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
-        this.mqtt = mqtt;
-        this.state = state;
-        this.publishEntityState = publishEntityState;
+        super(zigbee, mqtt, state, publishEntityState);
 
         // A map of all discoverd devices
         this.discovered = {};
diff --git a/lib/extension/livolo.js b/lib/extension/livolo.js
index f927bb78..e5328506 100644
--- a/lib/extension/livolo.js
+++ b/lib/extension/livolo.js
@@ -3,15 +3,16 @@
 const utils = require('../util/utils');
 const interval = utils.secondsToMilliseconds(1);
 const logger = require('../util/logger');
+const BaseExtension = require('./baseExtension');
 
 const foundationCfg = {manufSpec: 0, disDefaultRsp: 0};
 
 /**
  * Extension required for Livolo device support.
  */
-class Livolo {
+class Livolo extends BaseExtension {
     constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
+        super(zigbee, mqtt, state, publishEntityState);
         this.timer = null;
         this.configured = {};
     }
diff --git a/lib/extension/networkMap.js b/lib/extension/networkMap.js
index 47dc6144..5b9602ba 100644
--- a/lib/extension/networkMap.js
+++ b/lib/extension/networkMap.js
@@ -2,12 +2,11 @@ const settings = require('../util/settings');
 const utils = require('../util/utils');
 const zigbeeHerdsmanConverters = require('zigbee-herdsman-converters');
 const logger = require('../util/logger');
+const BaseExtension = require('./baseExtension');
 
-class NetworkMap {
+class NetworkMap extends BaseExtension {
     constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
-        this.mqtt = mqtt;
-        this.state = state;
+        super(zigbee, mqtt, state, publishEntityState);
 
         // Subscribe to topic.
         this.topic = `${settings.get().mqtt.base_topic}/bridge/networkmap`;
diff --git a/lib/extension/softReset.js b/lib/extension/softReset.js
index d2ef03ca..dee3f515 100644
--- a/lib/extension/softReset.js
+++ b/lib/extension/softReset.js
@@ -1,15 +1,16 @@
 /* istanbul ignore file */
-// deprecated
+// DEPRECATED
 const settings = require('../util/settings');
 const logger = require('../util/logger');
 const utils = require('../util/utils');
+const BaseExtension = require('./baseExtension');
 
 /**
  * This extensions soft resets the ZNP after a certain timeout.
  */
-class SoftReset {
+class SoftReset extends BaseExtension {
     constructor(zigbee, mqtt, state, publishEntityState) {
-        this.zigbee = zigbee;
+        super(zigbee, mqtt, state, publishEntityState);
         this.timer = null;
         this.timeout = utils.secondsToMilliseconds(settings.get().advanced.soft_reset_timeout);
     }