Take a look at the "Ultimate Chord Finder" tool. Top Right side of the web page in red banner. Middle Icon. You can look at all the chord structures. I would start with the major chords until you see one that looks like what you describe.
To do a chord diagram is no more then rows and columns with a dot where your finger go. Only 5 or 6 frets would be needed.
link to blank chord boxes
http://www.justinguitar.com/images/RS_images/BlankChordBoxes.pdf
hope this helps
