add close() to VirtualFileSytem

Author: tomasstupka

graalpython/org.graalvm.python.embedding/src/org/graalvm/python/embedding/utils/VirtualFileSystem.java

@@ -40,10 +40,11 @@
  */
 package org.graalvm.python.embedding.utils;
 
+import java.io.IOException;
 import java.nio.file.Path;
 import java.util.function.Predicate;
 
-public final class VirtualFileSystem {
+public final class VirtualFileSystem implements AutoCloseable {
 
     final VirtualFileSystemImpl impl;
 
@@ -197,4 +198,14 @@ public String getMountPoint() {
         return this.impl.mountPoint.toString();
     }
 
+    /**
+     * Closes the VirtualFileSystem and frees up potentially allocated resources.
+     *
+     * @throws IOException if the resources could not be freed.
+     */
+    @Override
+    public void close() throws IOException {
+        impl.close();
+    }
+
 }