check for vaultpath existence instead of catching (undocumented) exception

main/commons/src/main/java/org/cryptomator/common/vaults/VaultListManager.java

@@ -21,6 +21,7 @@ import javax.inject.Singleton;
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.NoSuchFileException;
 import java.nio.file.Path;
 import java.util.Collection;
@@ -126,15 +127,14 @@ public class VaultListManager {
 	}
 
 	private static VaultState.Value determineVaultState(Path pathToVault) throws IOException {
-		try {
-			return switch (CryptoFileSystemProvider.checkDirStructureForVault(pathToVault, VAULTCONFIG_FILENAME, MASTERKEY_FILENAME)) {
-				case VAULT -> VaultState.Value.LOCKED;
-				case UNRELATED -> VaultState.Value.MISSING;
-				case MAYBE_LEGACY -> Migrators.get().needsMigration(pathToVault, VAULTCONFIG_FILENAME, MASTERKEY_FILENAME) ? VaultState.Value.NEEDS_MIGRATION : VaultState.Value.MISSING;
-			};
-		} catch (NoSuchFileException e) {
+		if (!Files.exists(pathToVault)) {
 			return VaultState.Value.MISSING;
 		}
+		return switch (CryptoFileSystemProvider.checkDirStructureForVault(pathToVault, VAULTCONFIG_FILENAME, MASTERKEY_FILENAME)) {
+			case VAULT -> VaultState.Value.LOCKED;
+			case UNRELATED -> VaultState.Value.MISSING;
+			case MAYBE_LEGACY -> Migrators.get().needsMigration(pathToVault, VAULTCONFIG_FILENAME, MASTERKEY_FILENAME) ? VaultState.Value.NEEDS_MIGRATION : VaultState.Value.MISSING;
+		};
 	}
 
 }