The support Oxygen provides for editing DITA topics comes with quite an extensive set of new file templates used to create new DITA topic types. If you have a team of writers, you may want to filter out certain new file templates or add your custom new file templates, then share these custom templates with your team members.
This blog post will attempt to give you some clear steps for sharing a custom set of new file templates with your team.
All the original DITA new topic templates are located in the folder: OXYGEN_INSTALL_DIR\frameworks\dita\templates.
Instead of making changes directly to that folder, copying the entire DITA framework configuration folder (like OXYGEN_INSTALL_DIR\frameworks\dita), modifying and distributing it you can choose to extend the DITA framework and distribute the extension. In this way, you will benefit of new functionality added to the base framework by newer Oxygen versions and still use your customizations.
After you perform the steps above you will have in the dita-extension folder a fully functioning framework extension which can be shared with others.
After your team members install the framework they can check in Document Type Association preferences page in the list of Document Types to see if the framework is present and if it appears before the bundled DITA framework (meaning that it has higher priority).
You can use the framework extension mechanism to customize lots of aspects of the DITA functionality in Oxygen. For example you can remove various elements from the content completion list: http://blog.oxygenxml.com/2015/08/document-type-extension-sharing.html.