Here’s how to do it on Eclipse Indigo/Luna/Neon (as of 2018-05-22):
- Open the “project properties”
- pull down menu –> Project –> Properties
- A new dialog window named “Properties” will appear
- Create a “Resource Filter”
- Select Resource –> Resource Filters -> Add Filter…
- A new dialog window named “Add Resource Filter for project” will appear
- In the new dialog select the following
- Filter Type: Exclude All
- Applies to: Files
- Make sure to click the checkbox for “All children (recusive)”
- File and Folder Attributes
- select: Name
- select: Matches
- fill in: *.ooj
- Click OK
- Dialog closes
- Apply the new filter
- Click Apply
- You should see a change in your “Navigator” View
- Close the “Project Properties”
- Click OK
- Done