Bug 25387 [Wizards] [resources] File System Import changes file permissions
Creating a Project (simple or otherwise) and importing files into it using the import->File System wizard takes away the executable permission from the imported exec files.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/wizards/datatransfer/ImportOperation.java
*/
    void importFile(Object fileObject, int policy) {
        IContainer containerResource;
        try {
            containerResource = getDestinationContainerFor(fileObject);
        } catch (CoreException e) {
            IStatus coreStatus = e.getStatus();
            String newMessage = NLS.bind(DataTransferMessages.ImportOperation_coreImportError, fileObject, coreStatus.getMessage());
            IStatus status = new Status(coreStatus.getSeverity(), coreStatus
                    .getPlugin(), coreStatus.getCode(), newMessage, null);
            errorTable.add(status);
            return;
        }
        String fileObjectPath = provider.getFullPath(fileObject);
        monitor.subTask(fileObjectPath);
        IFile targetResource = containerResource.getFile(new Path(provider
                .getLabel(fileObject)));
        monitor.worked(1);
        if (rejectedFiles.contains(targetResource.getFullPath()))
            return;
        
        IPath targetPath = targetResource.getLocation();
        
        if (targetPath != null
                && (targetPath.toFile().equals(new File(fileObjectPath)))) {
            errorTable.add(new Status(IStatus.ERROR, PlatformUI.PLUGIN_ID, 0,
                    NLS.bind(DataTransferMessages.ImportOperation_targetSameAsSourceError, fileObjectPath), null));
            return;
        }
        InputStream contentStream = provider.getContents(fileObject);