AbstractTraversable.headOption throws NoSuchElementException

The subject is not really correct, but I'd like to know you're opinion on 
how to avoid this kind of issue:

import scala.collection.JavaConversions._

val files: java.lang.Iterable[...] = ...
files.headOption match { ... // This throws NoSuchElementException 

If you're curious the stack trace looked like this:
...
Caused by: java.util.NoSuchElementException
at 
com.google.common.collect.AbstractIterator.next(AbstractIterator.java:152)
at 
scala.collection.convert.Wrappers$JIteratorWrapper.next(Wrappers.scala:42)
at scala.collection.IterableLike$class.head(IterableLike.scala:91)
at scala.collection.AbstractIterable.head(Iterable.scala:54)
at 
scala.collection.TraversableLike$class.headOption(TraversableLike.scala:436)
at scala.collection.AbstractTraversable.headOption(Traversable.scala:105)
...

The reason is that the implementation of the Iterable can be iterated only 
once. But it took me a while to find it out. I simply called an API 
(SonarQube) to get a collection of files and I naturally didn't care about 
implementation of the Iterable interface. Should I? Who's fault is this and 
how to avoid it?

Thanks for opinions

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