fixed webdav copy/move [ci skip]

main/filesystem-api/src/main/java/org/cryptomator/filesystem/Folder.java

@@ -7,7 +7,6 @@ package org.cryptomator.filesystem;
 
 import java.io.IOException;
 import java.io.UncheckedIOException;
-import java.time.Instant;
 import java.util.stream.Stream;
 
 /**
@@ -151,17 +150,4 @@ public interface Folder extends Node {
 		}
 	}
 
-	/**
-	 * <p>
-	 * Sets the creation time of the folder.
-	 * <p>
-	 * Setting the creation time may not be supported by all {@link FileSystem FileSystems}. If the {@code FileSystem} this {@code Folder} belongs to does not support the
-	 * setting the creation time the behavior of this method is unspecified.
-	 * 
-	 * @param instant the time to set as creation time
-	 */
-	default void setCreationTime(Instant instant) throws UncheckedIOException {
-		throw new UncheckedIOException(new IOException("CreationTime not supported"));
-	}
-
 }

main/filesystem-api/src/main/java/org/cryptomator/filesystem/Node.java

@@ -5,6 +5,7 @@
  ******************************************************************************/
 package org.cryptomator.filesystem;
 
+import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.time.Instant;
 import java.util.Optional;
@@ -45,6 +46,19 @@ public interface Node {
 		return Optional.empty();
 	}
 
+	/**
+	 * <p>
+	 * Sets the creation time of this node.
+	 * <p>
+	 * Setting the creation time may not be supported by all {@link FileSystem FileSystems}. If the {@code FileSystem} this {@code Node} belongs to does not support the
+	 * setting the creation time the behavior of this method is unspecified.
+	 * 
+	 * @param instant the time to set as creation time
+	 */
+	default void setCreationTime(Instant instant) throws UncheckedIOException {
+		throw new UncheckedIOException(new IOException("CreationTime not supported"));
+	}
+
 	/**
 	 * @return the {@link FileSystem} this Node belongs to
 	 */

main/filesystem-api/src/main/java/org/cryptomator/filesystem/delegating/DelegatingFile.java

@@ -9,6 +9,7 @@
 package org.cryptomator.filesystem.delegating;
 
 import java.io.UncheckedIOException;
+import java.time.Instant;
 import java.util.Optional;
 
 import org.cryptomator.filesystem.File;
@@ -69,4 +70,14 @@ public abstract class DelegatingFile<D extends DelegatingFolder<D, ?>> extends D
 		}
 	}
 
+	@Override
+	public Optional<Instant> creationTime() throws UncheckedIOException {
+		return delegate.creationTime();
+	}
+
+	@Override
+	public void setCreationTime(Instant instant) throws UncheckedIOException {
+		delegate.setCreationTime(instant);
+	}
+
 }

main/filesystem-api/src/main/java/org/cryptomator/filesystem/delegating/DelegatingFolder.java

@@ -97,6 +97,11 @@ public abstract class DelegatingFolder<D extends DelegatingFolder<D, F>, F exten
 		}
 	}
 
+	@Override
+	public Optional<Instant> creationTime() throws UncheckedIOException {
+		return delegate.creationTime();
+	}
+
 	@Override
 	public void setCreationTime(Instant instant) throws UncheckedIOException {
 		delegate.setCreationTime(instant);