new file:   src/main/java/org/voyiger/java/AccessModifier.java
new file:   src/main/java/org/voyiger/java/RobotWithInnerClass.java
modified:   src/main/java/org/voyiger/util/FsUtils.java
modified:   src/main/java/org/voyiger/util/TimeUtils.java
new file:   src/test/java/org/voyiger/AccessModifierTest.java