Eclipse Character Encoding issue

I've recently been having the problem that every ColdFusion file that I attempted to open in CFEclipse was displaying character corruption of special characters (e.g. apostrophes, hyphens etc.)  - each corrupted character was being displayed as a black diamond with a question mark in it.

When I checked the character encoding for the file, it was showing as Default (determined from content: UTF-8). 

This was not correct - the correct encoding of the files should have been ISO-8859-1.

I checked a number of places, and could not detect where the setting was being applied.  I even tried overriding the Default encoding for the ColdFusion Source File content type - which made no difference at all.

Eventually, the problem turned out to have been caused by me adding the *.cfm extension to the XML Content type (so that I could open any CFM file within the XML editor if required) - which has a default encoding of UTF-8.  This was overriding the setting which had been applied to the ColdFusion Source File content type.

After removing the *.cfm extension from the XML Content type, my ColdFusion files could be opened as saved correctly without any character corruption.