Cleaned up documentation, added lacking Java annotations.

src/com/sk89q/worldedit/patterns/ClipboardPattern.java

@@ -40,7 +40,7 @@ public class ClipboardPattern implements Pattern {
     /**
      * Construct the object.
      *
-     * @param blockType
+     * @param clipboard
      */
     public ClipboardPattern(CuboidClipboard clipboard) {
         this.clipboard = clipboard;

src/com/sk89q/worldedit/patterns/RandomFillPattern.java

@@ -43,7 +43,7 @@ public class RandomFillPattern implements Pattern {
     /**
      * Construct the object.
      *
-     * @param blockType
+     * @param blocks
      */
     public RandomFillPattern(List<BlockChance> blocks) {
         double max = 0;

src/com/sk89q/worldedit/patterns/SingleBlockPattern.java

@@ -36,7 +36,7 @@ public class SingleBlockPattern implements Pattern {
     /**
      * Construct the object.
      * 
-     * @param blockType
+     * @param block
      */
     public SingleBlockPattern(BaseBlock block) {
         this.block = block;