chore: create event serializer interface

Author: AndreaGiulianelli

src/env/application/presenter/event/serialization/EventSerializer.java

@@ -0,0 +1,25 @@
+/*
+ * 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.serialization;
+
+import application.presenter.event.model.Event;
+
+import java.util.Optional;
+
+/**
+ * Interface that models an event serializer.
+ */
+public interface EventSerializer {
+    /**
+     * Serialize an event to string.
+     * @param eventToSerialize the event to serialize.
+     * @return the string corresponding to the event.
+     */
+    Optional<String> eventToString(Event<?> eventToSerialize);
+}