diff --git a/main/ui/src/main/java/org/cryptomator/ui/model/AutoUnlocker.java b/main/ui/src/main/java/org/cryptomator/ui/model/AutoUnlocker.java
index dbe3a7428..78b39fc98 100644
--- a/main/ui/src/main/java/org/cryptomator/ui/model/AutoUnlocker.java
+++ b/main/ui/src/main/java/org/cryptomator/ui/model/AutoUnlocker.java
@@ -74,7 +74,7 @@ public class AutoUnlocker {
 		try {
 			vault.unlock(CharBuffer.wrap(storedPw));
 			revealSilently(vault);
-		} catch (IOException | CryptoException | CommandFailedException e) {
+		} catch (IOException | CryptoException | Volume.VolumeException e) {
 			LOG.error("Auto unlock failed.", e);
 		} finally {
 			Arrays.fill(storedPw, ' ');
@@ -87,7 +87,7 @@ public class AutoUnlocker {
 		}
 		try {
 			mountedVault.reveal();
-		} catch (CommandFailedException e) {
+		} catch (Volume.VolumeException e) {
 			LOG.error("Auto unlock succeded, but revealing the drive failed.", e);
 		}
 	}
diff --git a/main/ui/src/main/java/org/cryptomator/ui/model/CommandFailedException.java b/main/ui/src/main/java/org/cryptomator/ui/model/CommandFailedException.java
deleted file mode 100644
index 77d04f845..000000000
--- a/main/ui/src/main/java/org/cryptomator/ui/model/CommandFailedException.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package org.cryptomator.ui.model;
-
-public class CommandFailedException extends Exception {
-
-	public CommandFailedException(String message) {
-		super(message);
-	}
-
-	public CommandFailedException(Throwable cause) {
-		super(cause);
-	}
-
-	public CommandFailedException(String message, Throwable cause) {
-		super(message, cause);
-	}
-
-}
diff --git a/main/ui/src/main/java/org/cryptomator/ui/model/FuseVolume.java b/main/ui/src/main/java/org/cryptomator/ui/model/FuseVolume.java
index ee5caa86f..510fe211f 100644
--- a/main/ui/src/main/java/org/cryptomator/ui/model/FuseVolume.java
+++ b/main/ui/src/main/java/org/cryptomator/ui/model/FuseVolume.java
@@ -12,6 +12,7 @@ import javax.inject.Inject;
 import org.apache.commons.lang3.SystemUtils;
 import org.cryptomator.common.settings.VaultSettings;
 import org.cryptomator.cryptofs.CryptoFileSystem;
+import org.cryptomator.frontend.fuse.mount.CommandFailedException;
 import org.cryptomator.frontend.fuse.mount.EnvironmentVariables;
 import org.cryptomator.frontend.fuse.mount.FuseMountFactory;
 import org.cryptomator.frontend.fuse.mount.FuseNotSupportedException;
@@ -44,7 +45,7 @@ public class FuseVolume implements Volume {
 	}
 
 	@Override
-	public void mount(CryptoFileSystem fs) throws IOException, FuseNotSupportedException, CommandFailedException {
+	public void mount(CryptoFileSystem fs) throws IOException, FuseNotSupportedException, VolumeException {
 		this.cfs = fs;
 		String mountPath;
 		if (vaultSettings.usesIndividualMountPath().get()) {
@@ -77,34 +78,34 @@ public class FuseVolume implements Volume {
 		}
 	}
 
-	private void mount() throws CommandFailedException {
+	private void mount() throws VolumeException {
 		try {
 			EnvironmentVariables envVars = EnvironmentVariables.create()
 					.withMountName(vaultSettings.mountName().getValue())
 					.withMountPath(mountPath)
 					.build();
 			this.fuseMnt = FuseMountFactory.getMounter().mount(cfs.getPath("/"), envVars);
-		} catch (org.cryptomator.frontend.fuse.mount.CommandFailedException e) {
-			throw new CommandFailedException("Unable to mount Filesystem", e);
+		} catch (CommandFailedException e) {
+			throw new VolumeException("Unable to mount Filesystem", e);
 		}
 	}
 
 	@Override
-	public void reveal() throws CommandFailedException {
+	public void reveal() throws VolumeException {
 		try {
 			fuseMnt.revealInFileManager();
-		} catch (org.cryptomator.frontend.fuse.mount.CommandFailedException e) {
+		} catch (CommandFailedException e) {
 			LOG.info("Revealing the vault in file manger failed: " + e.getMessage());
-			throw new CommandFailedException(e);
+			throw new VolumeException(e);
 		}
 	}
 
 	@Override
-	public synchronized void unmount() throws CommandFailedException {
+	public synchronized void unmount() throws VolumeException {
 		try {
 			fuseMnt.close();
-		} catch (org.cryptomator.frontend.fuse.mount.CommandFailedException e) {
-			throw new CommandFailedException(e);
+		} catch (CommandFailedException e) {
+			throw new VolumeException(e);
 		}
 		cleanup();
 	}
diff --git a/main/ui/src/main/java/org/cryptomator/ui/model/Vault.java b/main/ui/src/main/java/org/cryptomator/ui/model/Vault.java
index 2cc2e6da0..6972f5a13 100644
--- a/main/ui/src/main/java/org/cryptomator/ui/model/Vault.java
+++ b/main/ui/src/main/java/org/cryptomator/ui/model/Vault.java
@@ -97,7 +97,7 @@ public class Vault {
 		CryptoFileSystemProvider.changePassphrase(getPath(), MASTERKEY_FILENAME, oldPassphrase, newPassphrase);
 	}
 
-	public synchronized void unlock(CharSequence passphrase) throws CryptoException, IOException, CommandFailedException {
+	public synchronized void unlock(CharSequence passphrase) throws CryptoException, IOException, Volume.VolumeException {
 		Platform.runLater(() -> {
 			state.set(State.PROCESSING);
 		});
@@ -108,7 +108,7 @@ public class Vault {
 		});
 	}
 
-	public synchronized void lock(boolean forced) throws CommandFailedException {
+	public synchronized void lock(boolean forced) throws Volume.VolumeException {
 		Platform.runLater(() -> {
 			state.set(State.PROCESSING);
 		});
@@ -136,11 +136,11 @@ public class Vault {
 	public void prepareForShutdown() {
 		try {
 			lock(false);
-		} catch (CommandFailedException e) {
+		} catch (Volume.VolumeException e) {
 			if (volume.supportsForcedUnmount()) {
 				try {
 					lock(true);
-				} catch (CommandFailedException e1) {
+				} catch (Volume.VolumeException e1) {
 					LOG.warn("Failed to force lock vault.", e1);
 				}
 			} else {
@@ -149,7 +149,7 @@ public class Vault {
 		}
 	}
 
-	public void reveal() throws CommandFailedException {
+	public void reveal() throws Volume.VolumeException {
 		volume.reveal();
 	}
 
diff --git a/main/ui/src/main/java/org/cryptomator/ui/model/Volume.java b/main/ui/src/main/java/org/cryptomator/ui/model/Volume.java
index 3efbc726b..399e765da 100644
--- a/main/ui/src/main/java/org/cryptomator/ui/model/Volume.java
+++ b/main/ui/src/main/java/org/cryptomator/ui/model/Volume.java
@@ -20,13 +20,11 @@ public interface Volume {
 	 * @param fs
 	 * @throws IOException
 	 */
-	void mount(CryptoFileSystem fs) throws IOException, CommandFailedException;
+	void mount(CryptoFileSystem fs) throws IOException, VolumeException;
 
-	default void reveal() throws CommandFailedException {
-		throw new CommandFailedException("Not implemented.");
-	}
+	void reveal() throws VolumeException;
 
-	void unmount() throws CommandFailedException;
+	void unmount() throws VolumeException;
 
 	// optional forced unmounting:
 
@@ -34,8 +32,27 @@ public interface Volume {
 		return false;
 	}
 
-	default void unmountForced() throws CommandFailedException {
-		throw new CommandFailedException("Operation not supported.");
+	default void unmountForced() throws VolumeException {
+		throw new VolumeException("Operation not supported.");
+	}
+
+	/**
+	 * Exception thrown when a volume-specific command such as mount/unmount/reveal failed.
+	 */
+	class VolumeException extends Exception {
+
+		public VolumeException(String message) {
+			super(message);
+		}
+
+		public VolumeException(Throwable cause) {
+			super(cause);
+		}
+
+		public VolumeException(String message, Throwable cause) {
+			super(message, cause);
+		}
+
 	}
 
 }
diff --git a/main/ui/src/main/java/org/cryptomator/ui/model/WebDavVolume.java b/main/ui/src/main/java/org/cryptomator/ui/model/WebDavVolume.java
index 57b997149..115642ada 100644
--- a/main/ui/src/main/java/org/cryptomator/ui/model/WebDavVolume.java
+++ b/main/ui/src/main/java/org/cryptomator/ui/model/WebDavVolume.java
@@ -36,7 +36,7 @@ public class WebDavVolume implements Volume {
 	}
 
 	@Override
-	public void mount(CryptoFileSystem fs) throws CommandFailedException {
+	public void mount(CryptoFileSystem fs) throws VolumeException {
 		if (server == null) {
 			server = serverProvider.get();
 		}
@@ -48,7 +48,7 @@ public class WebDavVolume implements Volume {
 		mount();
 	}
 
-	private void mount() throws CommandFailedException {
+	private void mount() throws VolumeException {
 		if (servlet == null) {
 			throw new IllegalStateException("Mounting requires unlocked WebDAV servlet.");
 		}
@@ -61,36 +61,36 @@ public class WebDavVolume implements Volume {
 			this.mount = servlet.mount(mountParams); // might block this thread for a while
 		} catch (Mounter.CommandFailedException e) {
 			e.printStackTrace();
-			throw new CommandFailedException(e);
+			throw new VolumeException(e);
 		}
 	}
 
 	@Override
-	public void reveal() throws CommandFailedException {
+	public void reveal() throws VolumeException {
 		try {
 			mount.reveal();
 		} catch (Mounter.CommandFailedException e) {
 			e.printStackTrace();
-			throw new CommandFailedException(e);
+			throw new VolumeException(e);
 		}
 	}
 
 	@Override
-	public synchronized void unmount() throws CommandFailedException {
+	public synchronized void unmount() throws VolumeException {
 		try {
 			mount.unmount();
 		} catch (Mounter.CommandFailedException e) {
-			throw new CommandFailedException(e);
+			throw new VolumeException(e);
 		}
 		cleanup();
 	}
 
 	@Override
-	public synchronized void unmountForced() throws CommandFailedException {
+	public synchronized void unmountForced() throws VolumeException {
 		try {
 			mount.forced().orElseThrow(IllegalStateException::new).unmount();
 		} catch (Mounter.CommandFailedException e) {
-			throw new CommandFailedException(e);
+			throw new VolumeException(e);
 		}
 		cleanup();
 	}