Enable warnings during compilation

Enabled all recommended warnings during compilation.

Warnigs are:

- rawtypes - warns about the use of raw types
- unchecked - warns about unchecked operations
- static – warns about the access to a static member from an instance member
- cast – warns about unnecessary casts
- serial – warns about serializable classes not having a serialversionUID
- fallthrough – warns about the falling through in a switch statement

build.gradle

@@ -95,6 +95,18 @@ spotbugsTest {
 java.sourceCompatibility = JavaVersion.VERSION_11
 java.targetCompatibility = JavaVersion.VERSION_11
 
+
+compileJava {
+    options.compilerArgs = ["-Xlint:all"]
+    options.failOnError = false
+}
+
+compileTestJava {
+    options.compilerArgs = ["-Xlint:all"]
+    options.failOnError = false
+}
+
+
 licenseHeaders.enabled = true
 
 // The following check that have never be enabled in security