File list (Check if you may need any files):
regularExpression
.................\CharacterClassesTest.java
.................\CharacterTest.java
.................\GreedyQuantifiersTest.java
.................\JavaLangCharacterClassesTest.java
.................\LogicalOperatorsTest.java
.................\PosixTest.java
.................\PossessiveQuantifiersTest.java
.................\PredefinedCharacterClassesTest.java
.................\ReluctantQuantifiersTest.java
.................\UnicodeScriptsBlocksCategoriesBinaryPropertiesTest.java
.................\UsefulExpressionsTest.java