feat: update roomservice

Signed-off-by: Otavio Santana <otaviopolianasantana@gmail.com>

Author: otaviojava

src/main/java/org/soujava/demos/mongodb/document/RoomService.java

@@ -0,0 +1,22 @@
+package org.soujava.demos.mongodb.document;
+
+import jakarta.enterprise.context.ApplicationScoped;
+import jakarta.inject.Inject;
+
+@ApplicationScoped
+public class RoomService {
+
+    private final RoomRepository repository;
+
+    @Inject
+    public RoomService(RoomRepository repository) {
+        this.repository = repository;
+    }
+
+    /**
+     * Default constructor for CDI.
+     */
+    RoomService() {
+        this.repository = null;
+    }
+}