Add /src/main/java/lv.lyssa/j2ee7/ch2/ex01/Digits
Add /src/main/java/lv.lyssa/j2ee7/ch2/ex01/LegacyBookService01
Add /src/main/java/lv.lyssa/j2ee7/ch2/ex01/MockGenerator01
Add /src/main/java/lv.lyssa/j2ee7/ch2/ex01/NumberOfDigits
Add /src/main/java/resources/MATA-INF/beans.xml