Setup Hibernate for DB Nodes + PostgreSQL

SymphonyDatabaseNode/src/main/java/io/github/lumijiez/Main.java

@@ -1,7 +1,13 @@
 package io.github.lumijiez;
 
+import jakarta.persistence.EntityManager;
+
 public class Main {
     public static void main(String[] args) {
         System.out.println("Node up");
+        EntityManager em = Data.getEntityManager();
+
+        System.out.println("Connected to DB << symphony >>");
+        em.close();
     }
 }