properly handle shutdown of the server

src/main/java/de/uni_hamburg/corpora/server/Main.java

@@ -6,7 +6,6 @@ import org.glassfish.jersey.server.ResourceConfig;
 import org.slf4j.LoggerFactory;
 import org.slf4j.Logger;
 
-import java.io.IOException;
 import java.net.URI;
 import java.util.ArrayList;
 
@@ -58,23 +57,31 @@ public class Main {
     /**
      * Main method.
      * @param args No command line arguments expected
-     * @throws IOException Exception on server problems
      */
-    public static void main(String[] args) throws IOException {
+    public static void main(String[] args) {
         Main main = new Main();
         main.logger.info("Starting server");
         final HttpServer server = startServer();
-        System.out.println(String.format("Jersey app started with endpoints available at "
-                + "%s%nHit Ctrl-C to stop it...", BASE_URI));
-        System.in.read();
+        System.out.printf("Jersey app started with endpoints available at "
+                + "%s%nHit Ctrl-C to stop it...%n", BASE_URI);
+        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
             main.logger.info("Shutting down server");
             server.shutdown();
-
             try {
                 Main.cleanupThreads();
             } catch (InterruptedException e) {
                 e.printStackTrace();
             }
+        }));
+        main.mainWait();
+
+    }
+    synchronized void mainWait() {
+        try {
+            this.wait();
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
     }
 }