chore: create event interface

Author: AndreaGiulianelli

src/env/application/presenter/event/model/Event.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2023. Smart Operating Block
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ */
+
+package application.presenter.event.model;
+
+/**
+ * Interface that models a generic event with no additional fields but only with a key,
+ * a payload data of type E and the dateTime of the event itself.
+ * @param <E> the type of the payload data.
+ */
+public interface Event<E> {
+    /**
+     * Get the key of the event.
+     * @return the key.
+     */
+    String getKey();
+
+    /**
+     * Get the data payload of the event.
+     * @return the data payload.
+     */
+    E getData();
+
+    /**
+     * Get the date time in string format.
+     * @return the string of date time.
+     */
+    String getDateTime();
+}