cleanup ExecutorService after test

h2/src/test/org/h2/test/db/TestMultiThread.java

@@ -319,6 +319,7 @@ public class TestMultiThread extends TestBase implements Runnable {
         conn.close();
         // create views that reference the common views in different threads
         final ExecutorService executor = Executors.newFixedThreadPool(8);
+        try {
             final ArrayList<Future<Void>> jobs = new ArrayList<Future<Void>>();
             for (int i = 0; i < 1000; i++) {
                 final int j = i;
@@ -369,8 +370,10 @@ public class TestMultiThread extends TestBase implements Runnable {
                     }
                 }
             }
+        } finally {
             executor.shutdown();
             executor.awaitTermination(20, TimeUnit.SECONDS);
+        }
 
         deleteDb("lockMode");
     }