add Save Text support and rework package

- move maze within package maze

java/org/artisanlogiciel/games/maze/MazeParamsFixed.java

@@ -0,0 +1,63 @@
+package org.artisanlogiciel.games.maze;
+
+import java.io.File;
+
+public class MazeParamsFixed implements MazeParams {
+    long seed;
+    int width;
+    int height;
+    int maxdepth;
+    File labdir;
+    String name;
+
+    public MazeParamsFixed() {
+    }
+
+    public MazeParamsFixed(MazeParams params) {
+        setParams(params.getSaveDir(), params.getWidth(), params.getHeight(), params.getMaxDepth());
+    }
+
+    public void setParams(File saveDir, int W, int H, int MD) {
+        labdir = saveDir;
+        width = W;
+        height = H;
+        maxdepth = MD;
+    }
+
+    public MazeParamsFixed(File saveDir, int W, int H, int MD, long seed) {
+        name = null;
+        setParams(saveDir, W, H, MD);
+        this.seed = seed;
+    }
+
+    public long getSeed() {
+        return seed;
+    }
+
+    public int getWidth() {
+        return width;
+    }
+
+    public int getHeight() {
+        return height;
+    }
+
+    public int getMaxDepth() {
+        return maxdepth;
+    }
+
+    public void setName(String n) {
+        name = n;
+    }
+
+    public String getName() {
+        if (name == null) {
+            name = "lab" + width + "x" + height;
+        }
+        return name;
+    }
+
+    public File getSaveDir() {
+        return labdir;
+    }
+}