[java] add region snippets

extensions/java/package.json

@@ -17,6 +17,10 @@
 			"language": "java",
 			"scopeName": "source.java",
 			"path": "./syntaxes/java.tmLanguage.json"
+		}],
+		"snippets": [{
+			"language": "java",
+			"path": "./snippets/java.snippets.json"
 		}]
 	}
 }
\ No newline at end of file

extensions/java/snippets/java.snippets.json

+{
+	"Region Start": {
+		"prefix": "#region",
+		"body": [
+			"//#region"
+		],
+		"description": "Folding Region Start"
+	},
+	"Region End": {
+		"prefix": "#endregion",
+		"body": [
+			"//#endregion"
+		],
+		"description": "Folding Region End"
+	}
+}