Add javadoc to more utils methods, and make file tests take File as well as String.
Add javadoc to more utils methods, and make file tests take File as well as String.

jwlent55/voldemort,HB-SI/voldemort,jwlent55/voldemort,jwlent55/voldemort,squarY/voldemort,jalkjaer/voldemort,arunthirupathi/voldemort,FelixGV/voldemort,HB-SI/voldemort,squarY/voldemort,jeffpc/voldemort,rickbw/voldemort,PratikDeshpande/voldemort,arunthirupathi/voldemort,bitti/voldemort,HB-SI/voldemort,null-exception/voldemort,bhasudha/voldemort,medallia/voldemort,jalkjaer/voldemort,LeoYao/voldemort,squarY/voldemort,stotch/voldemort,bitti/voldemort,dallasmarlow/voldemort,birendraa/voldemort,LeoYao/voldemort,FelixGV/voldemort,jeffpc/voldemort,voldemort/voldemort,arunthirupathi/voldemort,gnb/voldemort,bitti/voldemort,null-exception/voldemort,squarY/voldemort,arunthirupathi/voldemort,arunthirupathi/voldemort,jalkjaer/voldemort,jeffpc/voldemort,jalkjaer/voldemort,HB-SI/voldemort,dallasmarlow/voldemort,birendraa/voldemort,cshaxu/voldemort,squarY/voldemort,rickbw/voldemort,birendraa/voldemort,cshaxu/voldemort,cshaxu/voldemort,voldemort/voldemort,LeoYao/voldemort,dallasmarlow/voldemort,mabh/voldemort,medallia/voldemort,voldemort/voldemort,gnb/voldemort,FelixGV/voldemort,FelixGV/voldemort,birendraa/voldemort,arunthirupathi/voldemort,jeffpc/voldemort,rickbw/voldemort,jwlent55/voldemort,bhasudha/voldemort,voldemort/voldemort,bhasudha/voldemort,rickbw/voldemort,birendraa/voldemort,mabh/voldemort,mabh/voldemort,stotch/voldemort,medallia/voldemort,stotch/voldemort,bitti/voldemort,PratikDeshpande/voldemort,medallia/voldemort,FelixGV/voldemort,FelixGV/voldemort,voldemort/voldemort,bhasudha/voldemort,jeffpc/voldemort,medallia/voldemort,LeoYao/voldemort,cshaxu/voldemort,bitti/voldemort,squarY/voldemort,dallasmarlow/voldemort,null-exception/voldemort,voldemort/voldemort,PratikDeshpande/voldemort,LeoYao/voldemort,LeoYao/voldemort,dallasmarlow/voldemort,jwlent55/voldemort,bhasudha/voldemort,stotch/voldemort,PratikDeshpande/voldemort,dallasmarlow/voldemort,PratikDeshpande/voldemort,stotch/voldemort,bhasudha/voldemort,null-exception/voldemort,HB-SI/voldemort,null-exception/voldemort,FelixGV/voldemort,jalkjaer/voldemort,gnb/voldemort,gnb/voldemort,medallia/voldemort,mabh/voldemort,jwlent55/voldemort,gnb/voldemort,null-exception/voldemort,squarY/voldemort,birendraa/voldemort,jeffpc/voldemort,gnb/voldemort,bitti/voldemort,rickbw/voldemort,stotch/voldemort,rickbw/voldemort,voldemort/voldemort,PratikDeshpande/voldemort,jalkjaer/voldemort,mabh/voldemort,bitti/voldemort,mabh/voldemort,cshaxu/voldemort,arunthirupathi/voldemort,HB-SI/voldemort,cshaxu/voldemort,jalkjaer/voldemort