Thank you for your post.
FileMaker Server will not work with Java 8. Please uninstall Java 8 and then install FileMaker Server.
Please see Knowledge Base Articles #13465 and #13466 for more information:
I have tried your suggestion several different ways. Last, I deleted the plugin, stop Safari. The installer installed all of FMS, then told me it needed to install Java. It then went completely through its process, successfully installing Java 7.25, it then goes back to the FMS installer and says it requires version 7 of Java at a minimum. It goes back to the Java installer and does the process over. It comes back and say it needs version 7 at a minimum. The only way out is to quit the installer, and of course nothing gets installed. Maybe this has something to do with the license issue.