I just downloaded IntelliJ 15.0.1 Community Edition because i\'m sick of Eclipse and it looks horrible on my laptop (Ubuntu 14.04 LTS). Everything was going pretty well until I
IntelliJ IDEA allows to manually add syntax highlighting settings in "Settings > File Types" even in the Community Edition BUT it ignores these settings after a restart.
These settings are stored in the user's home directory at e.g. ~/.IdeaIC2016.1/config/filetypes/*.xml. Unfortunately, after a restart of the IDE, these settings are NOT read, therefore it seems useless to configure any settings :-(
(~/.IdeaIC2016.1/config/filetypes/JSP.xml )
IntelliJ Community Edition also ignores any file-type settings for CSS-files that could look like this:
(~/.IdeaIC2016.1/config/filetypes/CSS.xml)