Bug 81603 [Import/Export] tar import/export does not preserve file permissions
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/wizards/datatransfer/ImportOperation.java
IImportStructureProvider provider,
            IOverwriteQuery overwriteImplementor, List filesToImport) {
        this(containerPath, source, provider, overwriteImplementor);
        setFilesToImport(filesToImport);
    }
    /**
     * Creates a new operation that imports specific file system objects.
     * <p>
     * The <code>provider</code> parameter allows this operation to deal with the
     * source object in an abstract way. This operation calls methods on the provider
     * and the provider in turn calls specific methods on the source object.
     * </p>
     * <p>
     * The <code>filesToImport</code> parameter specifies what file system objects 
     * are to be imported.
     * </p>
     * <p>
     * The default import behavior is to recreate the complete container structure
     * for the file system objects in their destination. If <code>setCreateContainerStructure</code>
     * is set to <code>false</code>, then no container structure is created for each of 
     * the file system objects.
     * </p>
     *
     * @param containerPath the full path of the destination container within the
     *   workspace
     * @param provider the file system structure provider to use
     * @param overwriteImplementor the overwrite strategy to use
     * @param filesToImport the list of file system objects to be imported
     *  (element type: <code>Object</code>)
     */