First: this is not a duplicate. Similar Question can be found here for IJ 13.
IntelliJ Idea 15 community Edition has a Visual Paradigm Community Edition plugin downloadable from here and after the installation, any option to draw diagrams is not visible. Any one has tried this ?
According to the last comment on your link:
You need to install Visual Paradigm as a separate application, this plugin will enable its integration within your IntelliJ. https://www.visual-paradigm.com/download/
Unfortunately visual paradigm is trialware.
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