Seq(javaCore, javaJdbc, javaEbean "extern_app" %% "information" % "version_number", "extern_app2" %% "information" % "version_number")

doesn't compile because there's no comma after javaEban, you need a comma between arguments to the Seq() function in Scala, just as you do need commas between arguments to a Java function:

    Seq(javaCore, javaJdbc, javaEbean, "extern_app" %% "information" % "version_number", "extern_app2" %% "information" % "version_number")