update snippets

lua/snippets/java.lua

@@ -93,7 +93,7 @@ return {
         -- if the function isn't abstract include a body
         return sn(nil, {
           t({ " {", "\t" }),
-          i(0),
+          i(1),
           t({ "", "}" })
         })
       end
@@ -107,13 +107,20 @@ return {
   }),
 
   -- class snippet
-  s("class", {
+  s({ trig = [[class\|interface]], trigEngine = "vim" }, {
     access_modifiers(1),
     modifiers(2),
-    c(3, {
-      t("class "),
-      t("interface ")
-    }),
+    d(3, function(_, snip)
+      local opts = { t("class "), t("interface ") }
+      if snip.trigger == "interface" then
+        -- flip interface and class
+        opts[1], opts[2] = opts[2], opts[1]
+      end
+
+      return sn(nil, {
+        c(1, opts)
+      })
+    end, {}),
     c(4, {
       f(file_name, {}),
       i(0, "MyClass")