fixup! Remove DB related modules

wsmaster/che-core-api-system/src/main/java/org/eclipse/che/api/system/server/SystemManager.java

@@ -16,7 +16,9 @@ import static org.eclipse.che.api.system.shared.SystemStatus.PREPARING_TO_SHUTDO
 import static org.eclipse.che.api.system.shared.SystemStatus.READY_TO_SHUTDOWN;
 import static org.eclipse.che.api.system.shared.SystemStatus.RUNNING;
 
+import com.google.common.annotations.VisibleForTesting;
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import jakarta.annotation.PreDestroy;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -143,4 +145,14 @@ public class SystemManager {
       shutdownLatch.countDown();
     }
   }
+
+  @PreDestroy
+  @VisibleForTesting
+  void shutdown() throws InterruptedException {
+    if (!statusRef.compareAndSet(RUNNING, PREPARING_TO_SHUTDOWN)) {
+      shutdownLatch.await();
+    } else {
+      doSuspendServices();
+    }
+  }
 }

wsmaster/che-core-api-system/src/test/java/org/eclipse/che/api/system/server/SystemManagerTest.java

@@ -80,6 +80,21 @@ public class SystemManagerTest {
     systemManager.stopServices();
   }
 
+  @Test
+  public void shutdownDoesNotFailIfServicesAreAlreadyStopped() throws Exception {
+    systemManager.stopServices();
+    systemManager.shutdown();
+
+    verifyShutdownCompleted();
+  }
+
+  @Test
+  public void shutdownStopsServicesIfNotStopped() throws Exception {
+    systemManager.shutdown();
+
+    verifySuspendCompleted();
+  }
+
   private void verifyShutdownCompleted() throws InterruptedException {
     verify(terminator, timeout(2000)).terminateAll();
     verifyEvents();