fix resource leak

src/main/java/org/cryptomator/common/mountpoint/MountPointHelper.java

@@ -66,9 +66,9 @@ class MountPointHelper {
 	private void clearIrregularUnmountDebris(Path dirContainingMountPoints) {
 		IOException cleanupFailed = new IOException("Cleanup failed");
 
-		try {
+		try (var ds = Files.newDirectoryStream(dirContainingMountPoints)) {
 			LOG.debug("Performing cleanup of mountpoint dir {}.", dirContainingMountPoints);
-			for (Path p : Files.newDirectoryStream(dirContainingMountPoints)) {
+			for (Path p : ds) {
 				try {
 					var attr = Files.readAttributes(p, BasicFileAttributes.class, LinkOption.NOFOLLOW_LINKS);
 					if (attr.isOther() && attr.isDirectory()) { // yes, this is possible with windows junction points -.-
@@ -113,8 +113,10 @@ class MountPointHelper {
 	}
 
 	private void ensureIsEmpty(Path dir) throws IOException {
-		if (Files.newDirectoryStream(dir).iterator().hasNext()) {
-			throw new DirectoryNotEmptyException(dir.toString());
+		try (var ds = Files.newDirectoryStream(dir)) {
+			if (ds.iterator().hasNext()){
+				throw new DirectoryNotEmptyException(dir.toString());
+			}
 		}
 	}
 }

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

@@ -7,9 +7,11 @@ import java.io.EOFException;
 import java.io.IOException;
 import java.net.StandardProtocolFamily;
 import java.net.UnixDomainSocketAddress;
+import java.nio.channels.AlreadyBoundException;
 import java.nio.channels.AsynchronousCloseException;
 import java.nio.channels.ClosedChannelException;
 import java.nio.channels.ServerSocketChannel;
+import java.nio.channels.UnsupportedAddressTypeException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.concurrent.Executor;
@@ -29,10 +31,18 @@ class Server implements IpcCommunicator {
 	public static Server create(Path socketPath) throws IOException {
 		Files.createDirectories(socketPath.getParent());
 		var address = UnixDomainSocketAddress.of(socketPath);
-		var serverSocketChannel = ServerSocketChannel.open(StandardProtocolFamily.UNIX);
-		serverSocketChannel.bind(address);
-		LOG.info("Spawning IPC server listening on socket {}", socketPath);
-		return new Server(serverSocketChannel, socketPath);
+		ServerSocketChannel ch = null;
+		try {
+			ch = ServerSocketChannel.open(StandardProtocolFamily.UNIX);
+			ch.bind(address);
+			LOG.info("Spawning IPC server listening on socket {}", socketPath);
+			return new Server(ch, socketPath);
+		} catch (IOException | AlreadyBoundException | UnsupportedAddressTypeException e) {
+			if (ch != null) {
+				ch.close();
+			}
+			throw e;
+		}
 	}
 
 	@Override