# basic exception handling
begin
    nil + 1
rescue Exception => e
    $stderr.puts( e )
end

# defining your own exceptions
class MyException < Exception
    def initialize( msg )
        super( msg )
    end
end

# throwing your own exception
begin
    raise MyException.new( "Error msg!" )   
rescue MyException => e
    $stderr.puts( e )
end

# java's finally block is also in ruby, but it is known as ensure
file = open( "file" )
begin
    file.each do |line|
        print line
    end
rescue Exception => e
    $stderr.puts( e )
ensure
    file.close
end