Teiid is the runtime server, the current latest version is 9.0 which runs on WildFly 9.01 Final. The previous version that is based on JBoss EAP is Teiid 8.12.5 which runs on JBoss EAP 6.4.Alpha.
"Teiid Designer" is tooling project for Teiid, its latest version 10.0, however this version is designed to support JBoss EAP 6.4 and Teiid 8.12.5. There is NO supported Teiid Designer that works with Teiid 9.0 and WildFly 9.0
So, install JBoss EAP 6.4 Alpha + Teiid 8.12.5 or You can download JBoss Data Virtualization 6.3 Beta (this is a Redhat supported version based Teiid 8.12) from JBoss Data Virtualization - Overview then install Teiid Designer t connect to those platforms.