cleanup

src/main/java/org/cryptomator/ipc/IpcCommunicator.java

@@ -7,6 +7,7 @@ import org.slf4j.LoggerFactory;
 
 import java.io.Closeable;
 import java.io.IOException;
+import java.io.UncheckedIOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.attribute.BasicFileAttributes;
@@ -84,4 +85,12 @@ public interface IpcCommunicator extends Closeable {
 	 */
 	@Override
 	void close() throws IOException;
+
+	default void closeUnchecked() throws UncheckedIOException {
+		try {
+			close();
+		} catch (IOException e) {
+			throw new UncheckedIOException(e);
+		}
+	}
 }

src/main/java/org/cryptomator/ipc/Server.java

@@ -76,6 +76,7 @@ class Server implements IpcCommunicator {
 			serverSocketChannel.close();
 		} finally {
 			Files.deleteIfExists(socketPath);
+			LOG.debug("IPC server closed");
 		}
 	}
 }

src/main/java/org/cryptomator/launcher/Cryptomator.java

@@ -83,14 +83,7 @@ public class Cryptomator {
 				LOG.info("Found running application instance. Shutting down...");
 				return 2;
 			} else {
-				// TODO: move this to a better place?
-				shutdownHook.runOnShutdown(() -> {
-					try {
-						communicator.close();
-					} catch (IOException e) {
-						LOG.warn("IPC cleanup failed");
-					}
-				});
+				shutdownHook.runOnShutdown(communicator::closeUnchecked);
 				var executor = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat("IPC-%d").build());
 				var msgHandler = ipcMessageHandler.get();
 				msgHandler.handleLaunchArgs(List.of(args));