failure of resource bundle test shouldn't depend on whether we have a java parser registered
pull up setSelectedEditor() to FileEditorManager (IDEA-103374)
build fix; I was confused, sorry
removed duplicated code for deleting files that starts with name of given one
char is unsigned so no need to compare it with zero : char < 0 is always false and  char >= 0 is always true
small refactoring for better code understanding and easier subsequent change
- devirtualize ContentOutputStream and AttributeOutputStream by inlining BaseOutputStream to them
- inline findContentPage into read and write usage
----------
so far after refactoring becomes evident that synchronized by attributeId seems to be redundant