Most of the Java-based projects uses Maven as their Build tool. However, most of the people uses SBT as build tool to develop their Scala-based applications, but Some Teams uses Maven too as a build tool to develop their Scala-based applications.
Maven folder structure for both Java-based and Scala-based projects is almost same just one folder name change as shown in the below diagrams: java and scala folder names.
Java-based Maven Project Folder Structure:
Scala-based Maven Project Folder Structure: