diff --git a/core/src/main/java/edu/umd/cs/piccolo/util/PAffineTransformException.java b/core/src/main/java/edu/umd/cs/piccolo/util/PAffineTransformException.java
index 4b489c5..5381784 100644
--- a/core/src/main/java/edu/umd/cs/piccolo/util/PAffineTransformException.java
+++ b/core/src/main/java/edu/umd/cs/piccolo/util/PAffineTransformException.java
@@ -9,26 +9,62 @@
 
     private final PAffineTransform errantTransform;
 
+    /**
+     * Constructs an Exception that represents an error with the
+     * errantTransform.
+     * 
+     * @param errantTransform transform that caused the error
+     */
     public PAffineTransformException(final PAffineTransform errantTransform) {
         this.errantTransform = errantTransform;
     }
 
+    /**
+     * Constructs an Exception that represents an error with the
+     * errantTransform.
+     * 
+     * @param message Text message provided by the programmer about the context
+     *            of the error
+     * @param errantTransform transform that caused the error
+     */
     public PAffineTransformException(final String message, final PAffineTransform errantTransform) {
         super(message);
         this.errantTransform = errantTransform;
     }
 
+    /**
+     * Constructs an Exception that wraps another and records the errant
+     * transform.
+     * 
+     * @param throwable the root cause of the exception
+     * @param errantTransform transform that's related to the error
+     */
     public PAffineTransformException(final Throwable throwable, final PAffineTransform errantTransform) {
         super(throwable);
         this.errantTransform = errantTransform;
     }
 
+    /**
+     * Constructs an Exception that wraps another and records the errant
+     * transform and provides a human readable message about the exception's
+     * context.
+     * 
+     * @param message Text message provided by the programmer about the context
+     *            of the error
+     * @param throwable the root cause of the exception
+     * @param errantTransform transform that's related to the error
+     */
     public PAffineTransformException(final String message, final Throwable throwable,
             final PAffineTransform errantTransform) {
         super(message, throwable);
         this.errantTransform = errantTransform;
     }
 
+    /**
+     * Used to access the transform related to this exception.
+     * 
+     * @return transform related to the exception
+     */
     public PAffineTransform getErrantTransform() {
         return errantTransform;
     }