How to stop Intellij from creating src/main/java and src/main/scala-x folders?

I have a SBT project in Intellij 15.0.2 for scala only programming.

For some reason, the project keeps creating the following folders in my project:

• src/main/java
• src/main/scala-2.10
• src/main/scala-2.11
• src/test/java
• src/test/scala-2.10
• src/test/scala-2.11

I have attempted to remove them by unchecking them as "Sources" or "Tests" in my Project Structure and then deleting the folders. But they are immediately re-created by Intellij ...