Add flower pot state

src/main/java/org/bukkit/block/FlowerPot.java

@@ -0,0 +1,23 @@
+package org.bukkit.block;
+
+import org.bukkit.material.MaterialData;
+
+/**
+ * Represents a flower pot.
+ */
+public interface FlowerPot extends BlockState {
+
+    /**
+     * Gets the contents of the flower pot.
+     *
+     * @return the contents.
+     */
+    MaterialData getContents();
+
+    /**
+     * Sets the contents of the flower pot.
+     *
+     * @param contents the new contents.
+     */
+    void setContents(MaterialData contents);
+}

src/main/java/org/bukkit/material/FlowerPot.java

@@ -52,7 +52,9 @@ public FlowerPot(final Material type, final byte data) {
      *
      * @return material MaterialData for the block currently in the flower pot
      *     or null if empty
+     * @deprecated Use {@link org.bukkit.block.FlowerPot#getContents()} instead.
      */
+    @Deprecated
     public MaterialData getContents() {
         switch (getData()) {
             case 1:
@@ -86,7 +88,9 @@ public MaterialData getContents() {
      * Set the contents of the flower pot
      *
      * @param materialData MaterialData of the block to put in the flower pot.
+     * @deprecated Use {@link org.bukkit.block.FlowerPot#setContents(MaterialData)} instead.
      */
+    @Deprecated
     public void setContents(MaterialData materialData) {
         Material mat = materialData.getItemType();