Inspection: getInstance() can not return null
Inspection: closing streams, explicit UTF-8 encoding
inspection: made static field private + immutable for the set
inspection: unnecessary qualifier
inspection: missing charset parameter
inspection: missing default case for switch
inspections: concatenation with one character string, sorting modifiers, correct setProperty() method
inspections: parentheses, static field accessed via sub class
inspection: missing braces
inspection: 'literal'.equals(...)
inspection: missorted qualifiers
inspection: redundant initialisation
inspection: redundant interface
inspection: using isEmpty()
inspection: redundant modifier
inspection: redundant qualifier for static constant/method
inspection: redundant modifier
inspection: unnecessary modifier in interface
inspection: unnecessary parentheses
inspection: unnecessary qualifier for 'this'