diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 00000000..62de2e58
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,4 @@
+bintrayUsername=
+bintrayApiKey=
+bintrayGpgPassword=
+dryRun=false
diff --git a/gradle/android-jcenter-install.gradle b/gradle/android-jcenter-install.gradle
index 51c66319..72af7ca5 100644
--- a/gradle/android-jcenter-install.gradle
+++ b/gradle/android-jcenter-install.gradle
@@ -12,19 +12,19 @@ ext {
 }
 
 def getBintrayUsername() {
-    return hasProperty('bintrayUsername') ? property('bintrayUsername') : System.getenv('BINTRAY_USERNAME')
+    return property('bintrayUsername') || System.getenv('BINTRAY_USERNAME')
 }
 
 def getBintrayApiKey() {
-    return hasProperty('bintrayApiKey') ? property('bintrayApiKey') : System.getenv('BINTRAY_API_KEY')
+    return property('bintrayApiKey') || System.getenv('BINTRAY_API_KEY')
 }
 
 def getBintrayGpgPassword() {
-    return hasProperty('bintrayGpgPassword') ? property('bintrayGpgPassword') : System.getenv('BINTRAY_GPG_PASSWORD')
+    return property('bintrayGpgPassword') || System.getenv('BINTRAY_GPG_PASSWORD')
 }
 
 def dryRunOnly() {
-    return hasProperty('dryRun') ? property('dryRun').toBoolean() : false 
+    return hasProperty('dryRun') ? property('dryRun').toBoolean() : false
 }
 
 def pomConfig = {
diff --git a/java/build.gradle b/java/build.gradle
index 28ac9f0f..0233c095 100644
--- a/java/build.gradle
+++ b/java/build.gradle
@@ -1,4 +1,4 @@
-apply plugin: "com.jfrog.bintray"
+apply plugin: 'com.jfrog.bintray'
 apply plugin: 'com.android.library'
 apply plugin: 'com.github.dcendents.android-maven'
 apply plugin: 'maven-publish'