Added docs into branch

Signed-off-by: Marcin Woźniak <y0rune@aol.com>

buisnesslogic/src/main/java/com/plannaplan/entities/Course.java

@@ -10,6 +10,10 @@ import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.OneToMany;
 
+/**
+ *  Entity of Course grouping of state of course
+ */
+
 @Entity
 public class Course {
     @Id