ImageJUpdater: let any/all services be null

The code was already written to support the services not being set,
with various fallbacks in place. So let's mark the params accordingly.

Author: ctrueden

src/main/java/net/imagej/ui/swing/updater/ImageJUpdater.java

@@ -71,16 +71,16 @@
 public class ImageJUpdater implements UpdaterUI {
 	private UpdaterFrame main;
 
-	@Parameter
+	@Parameter(required = false)
 	private StatusService statusService;
 
-	@Parameter
+	@Parameter(required = false)
 	private LogService log;
 
-	@Parameter
+	@Parameter(required = false)
 	private UploaderService uploaderService;
 
-	@Parameter
+	@Parameter(required = false)
 	private CommandService commandService;
 
 	private final static String UPDATER_UPDATING_THREAD_NAME = "Updating the Updater itself!";

src/main/java/net/imagej/ui/swing/updater/UpdaterFrame.java

@@ -357,7 +357,7 @@ public void run() {
 									upload();
 								}
 								catch (final InstantiationException e) {
-									log.error(e);
+									if (log != null) log.error(e);
 									error("Could not upload (possibly unknown protocol)");
 								}
 							}
@@ -395,7 +395,7 @@ public void setVisible(final boolean visible) {
 			} catch (final InterruptedException e) {
 				// ignore
 			} catch (final InvocationTargetException e) {
-				log.error(e);
+				if (log != null) log.error(e);
 			}
 			return;
 		}
@@ -606,7 +606,7 @@ public void install() {
 			installer.done();
 		}
 		catch (final Exception e) {
-			log.error(e);
+			if (log != null) log.error(e);
 			// TODO: remove "update/" directory
 			error("Installer failed: " + e);
 			installer.done();