Added "keep-alive" for database

src/main/java/netneutrality/ThreadManager.java

@@ -8,12 +8,13 @@ package netneutrality;
 
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 
 public class ThreadManager {
 
     public static final ExecutorService executor = Executors.newSingleThreadExecutor();
-    // public static ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
+    public static ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);