maven-indexer ignores war files -

i'm using basicusageexample retrieve artifacts nexus repository:

https://github.com/apache/maven-indexer/blob/master/indexer-examples/indexer-examples-basic/src/main/java/org/apache/maven/indexer/examples/basicusageexample.java

problem is, i'm looking war files especially, seem ignored. can tell me how receive well?